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Preface 1
UNIT 1 THE CELL ULAR FOUNDATION OF LIFE
CHAP TER 1
Introduction to Biology 5
Introduction 5
1.1Themes and Concepts of Biology 5
1.2The Process of Science 16
Key Terms 24
Chapter Summary 24
Visual Connection Questions 25
Review Questions 25
Critical Thinking Questions 26
CHAP TER 2
Chemistry of Life 2... | {"file_size_mb": 146.57, "uploaded_via": "batch_uploader", "producer": "PDFium", "creation_date": "D:20251101002707", "page": 7, "file_type": ".pdf", "batch_upload": true, "page_label": "7", "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "file_hash": "e0d8e64cc71418b4d6a1c0c5bd20... |
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How Cells Obtain Energy 89
Introduction 89
4.1Energy and Metabolism 90
4.2Glycolysis 100
4.3Citric Acid Cycle and Oxidative Phosphorylation 101
4.4Fermentation 105
4.5Connections to Other Metabolic Pathways 108
Key Terms 110
Chapter Summary 111
Visual Connection Questions 112
Review Questions 112
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Review Questions 148
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CHAP TER 7
The Cellular Basis of Inheritance 151
Introduction 151
7.1Sexual Reproduction 152
7.2Meiosis 155
7.3Variations in Meiosis 160
Key Terms 167
Chapter Summary 167
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Critical Thinking Questions 169
CHAP TER 8
Patterns of Inheritance 171
Introduction 171
8.1Mendel’s Experiments 172
8.2Laws of Inheritance 176
8.3Extensions of the Laws of Inheritance 183
Key Terms 192
Chapter Summary 192
Visual Connection Questions 193
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Key Terms 243
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Visual Connection Questions 244
Review Questions 244
Critical Thinking Questions 245
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CHAP TER 11
Evolution and Its Processes 247
Introduction 247
11.1Discovering How Populations Change 248
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11.4Speciation 259
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Key Terms 268
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Review Questions 317
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CHAP TER 14
Diversity of Plants 319
Introduction 319
14.1The Plant Kingdom 320
14.2Seedless Plants 326
14.3Seed Plants: Gymnosperms 333
14.4Seed Plants: Angiosperms 338
Key Terms 347
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Review Questions 349
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CHAP TER 15
Diversity of Animals 351
Introduction 351
15.1Features of the Animal Kingdom 352
15.2Sponges and Cnidarians 357
15.3Flatworms, Nematodes, and Arthropods 363
15.4Mollusks and Annelids 370
15.5Echinoderms and Chordates 376
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Critical Thinking Questions 443
CHAP TER 17
The Immune System and Disease 445
Introduction 445
17.1Viruses 446
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17.3Adaptive Immunity 456
17.4Disruptions in the Immune System 465
Key Terms 469
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Animal Reproduction and Development 473
Introduction 473
18.1How Animals Reproduce 474
18.2Development and Organogenesis 478
18.3Human Reproduction 480
Key Terms 491
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Visual Connection Questions 493
Review Questions 493
Critical Thinking Questions 494
UNIT 6 ECOLOGY
CHAP TER 19
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Key Terms 559
Chapter Summary 560
Visual Connection Questions 561
Review Questions 561
Critical Thinking Questions 562
CHAP TER 21
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Introduction 563
21.1Importance of Biodiversity 564
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Critical Thinking Questions 588
Appendix A The Periodic Table of Elements 589
Appendix B Geological Time 591
Appendix C Measurements and the Metric System 593
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About OpenStax
OpenStax is part of Rice University, which is a 501(c)(3)
nonprofit charitable corporation. As an educational
initiative, it's our mission to improve educational
access and learning for everyone. Through our
partnerships with philanthropic organizations and our
alliance with other educational res... | {"source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517de72c71db6", "file_size_mb": 146.57, "file_type": ".pdf", "source_file": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "creator": "PD... |
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most relevant to the needs of your course. Feel free to
remix the content by assigning your students certain
chapters and sections in your syllabus, in the order that
you prefer. You can even provide a direct link in your
syllabus to the sections in the web view ... | {"page": 15, "creationdate": "D:20251101002707", "creator": "PDFium", "file_name": "Concepts of Biology.pdf", "producer": "PDFium", "creation_date": "D:20251101002707", "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "total_pages": 615, "batch_upload": true, "page_label": "15", "f... |
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this text that does not have attribution provided, use
the following attribution: Copyright Rice University,
OpenStax, under CC BY 4.0 license.
Errata
All OpenStax textbooks undergo a rigorous review
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textbook, error... | {"page": 15, "page_label": "15", "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517de72c71db6", "source_file": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "file_type": ".pdf", "batch_upload": true, "upload_timestamp": "2025-11-06T07:48:19.078368", "uploaded_via": "batc... |
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your book page on OpenStax.org.
Format
You can access this textbook for free in web view or
PDF through OpenStax.org, and for a low cost in print.
The web view is the recommended format because it is
the most accessible – including being WCAG 2.0 AA
compliant – and... | {"producer": "PDFium", "creator": "PDFium", "batch_upload": true, "file_name": "Concepts of Biology.pdf", "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "file_type": ".pdf", "creationdate": "D:20251101002707", "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517de... |
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vocabulary, the typical non-science major student
needs information presented in a way that is easy to
read and understand. Even more importantly, the
content should be meaningful. Students do much
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incorporates critical thinking and clicker questions to
help students understand—and apply—key concepts.
Preface 1 | {"file_type": ".pdf", "page": 15, "creator": "PDFium", "page_label": "15", "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "file_size_mb": 146.57, "total_pages": 615, "creationdate": "D:20251101002707", "uploaded_via": "batch_uploader", "upload_timestamp": "2025-11-06T07:48:19.078... |
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OurConcepts of Biologytextbook adheres to the scope
and sequence of most one-semester non-majors
courses nationwide. We also strive to make biology, as
a discipline, interesting and accessible to students. In
addition to a comprehensive coverage of core concepts
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structures, functions, and processes of the most
basic unit of life: the cell.
• Unit 2:Cell Division and Genetics. Our genetics
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biology reappears throughout the textbook in
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localized, real-world issues of conservation and
biodiversity.
Pedagogical Foundation and Features
Because of the impact science has on students and
society, an important goal of science education is to
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literacy. Throughout the text, you will find features that
engage the students in scientific inquiry by taking
selected topics a step further.
• Evolution Connectionfeatures uphold the
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Store.”
Answers to Questions in the Book
Answers to Visual Connection Questions, Review
Questions, and Critical Thinking Questions are provided
in the Instructor Answer Guide via the Instructor
Resources page. Select answers to these questions are
provided for students via th... | {"file_name": "Concepts of Biology.pdf", "file_type": ".pdf", "total_pages": 615, "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "page": 16, "source_file": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "creationdate": "D:20251101002707", "file_hash"... |
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• Link to Learningfeatures direct students to online
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About Our Team
Concepts of Biologywould not be possible if not for the
... | {"page": 17, "upload_timestamp": "2025-11-06T07:48:19.078368", "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "page_label": "17", "producer": "PDFium", "batch_upload": true, "file_type": ".pdf", "uploaded_via": "batch_uploader", "creator": "PDFium", "creationdate": "D:20251101002... |
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Sue Chaplin, University of St. Thomas
Diane Day, Clayton State University
Jean DeSaix, University of North Carolina at Chapel Hill
David Hunnicutt, St. Norbert College
Barbara Kuehner, Hawaii Community College
Brenda Leady, University of Toledo
Bernie Marcus, Genesee Community Co... | {"source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "file_size_mb": 146.57, "creationdate": "D:20251101002707", "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517de72c71db6", "file_type": ".pdf", "upload_timestamp": "2025-11-06T07:48:19.078368", "uploaded_via": "bat... |
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Gary Shultz, Marshall University
Donald Slish, SUNY Plattsburgh
Anh-Hue Tu, Georgia Southwestern State University
Elena Zoubina, Bridgewater State University
Learning Resources
Wiley Plus for Biology-Fall 2013 PilotWileyPLUS
provides an engaging online environment for effective
teachin... | {"file_type": ".pdf", "file_name": "Concepts of Biology.pdf", "creator": "PDFium", "page_label": "17", "page": 17, "source_file": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "producer": "PDFium", "batch_upload": true, "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts... |
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Fall 2013 Pilot.
Concepts of Biology Powerpoint Slides (faculty only)
The PowerPoint slides are based on the extensive
illustrations from College Physics. They can be edited,
incorporated into lecture notes, and you are free to
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structured and open-ended experimentation on
simulated systems. In response to popular demand,
SimBio has begun applying the same powerful
approaches to topics in cell biology, genetics, and
neurobiology. All of SimBio’s modules include instant-
feedback questions that enh... | {"creator": "PDFium", "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "file_name": "Concepts of Biology.pdf", "batch_upload": true, "source_file": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "file_size_mb": 146.57, "upload_timestamp": "2025-11-06T0... |
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instructor’s guide is designed to provide maximum
guidance for delivering the content in an interesting
and dynamic manner.
PowerPoint lecture slides.The PowerPoint slides
provide learning objectives, images and descriptions,
feature focuses, and discussion questions as a... | {"source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "page_label": "17", "batch_upload": true, "page": 17, "creationdate": "D:20251101002707", "file_type": ".pdf", "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517de72c71db6", "producer": "PDFium", "upload_timestamp"... |
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Academic integrity builds trust, understanding, equity,
and genuine learning. While students may encounter
significant challenges in their courses and their lives,
doing their own work and maintaining a high degree of
authenticity will result in meaningful outcomes that will
extend far beyond their c... | {"uploaded_via": "batch_uploader", "batch_upload": true, "creationdate": "D:20251101002707", "total_pages": 615, "page": 18, "creator": "PDFium", "page_label": "18", "file_name": "Concepts of Biology.pdf", "producer": "PDFium", "file_size_mb": 146.57, "source_file": "downloads\\education\\academic_tutoring\\Biology\\Co... |
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course policies. You may then include the graphic on your
syllabus, present it in your first course meeting, or create a
handout for students. (attribution: Copyright Rice University,
OpenStax, under CC BY 4.0 license)
At OpenStax we are also developing resou... | {"batch_upload": true, "uploaded_via": "batch_uploader", "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "file_type": ".pdf", "file_size_mb": 146.57, "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517de72c71db6", "file_name": "Concepts of Biology.pdf", "total_pag... |
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0.0... | INTRODUCTION
CHAPTER 1
Introduction to Biology
1.1Themes and Concepts of Biology
1.2The Process of Science
Viewed from space, Earth (Figure 1.1) offers few clues about the diversity of life
forms that reside there. The first forms of life on Earth are thought to have been microorganisms
that existed for billions of yea... | {"creation_date": "D:20251101002707", "total_pages": 615, "file_name": "Concepts of Biology.pdf", "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "batch_upload": true, "page_label": "19", "file_size_mb": 146.57, "file_type": ".pdf", "upload_timestamp": "2025-11-06T07:48:19.078368"... |
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Biologyis the science that studies life. What exactly is life? This may sound like a silly question
with an obvious answer, but it is not easy to define life. For example, a branch of biology called
virology studies viruses, which exhibit some of the characteristi... | {"page_label": "19", "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517de72c71db6", "producer": "PDFium", "total_pages": 615, "page": 19, "creator": "PDFium", "upload_timestamp": "2025-11-06T07:48:19.078368", "file_... |
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0.0... | they do not meet the criteria that biologists use to define life.
From its earliest beginnings, biology has wrestled with four questions: What are the shared
properties that make something “alive”? How do those various living things function? When faced
with the remarkable diversity of life, how do we organize the diff... | {"total_pages": 615, "batch_upload": true, "file_name": "Concepts of Biology.pdf", "creation_date": "D:20251101002707", "page_label": "20", "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "source_file": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "... |
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0.04... | energy processing, and evolution. When viewed together, these eight characteristics serve to
define life.
Order
Organisms are highly organized structures that consist of one or more cells. Even very simple,
single-celled organisms are remarkably complex. Inside each cell, atoms make up molecules.
These in turn make up ... | {"creation_date": "D:20251101002707", "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517de72c71db6", "file_name": "Concepts of Biology.pdf", "creationdate": "D:20251101002707", "page_label": "20", "creator": "PDFium", "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf... |
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0.04932... | FIGURE 1.2 A toad represents a highly organized structure consisting of cells, tissues, organs, and organ systems.
(credit: "Ivengo(RUS)"/Wikimedia Commons)
Sensitivity or Response to Stimuli
Organisms respond to diverse stimuli. For example, plants can bend toward a source of light or
respond to touch (Figure 1.3). Ev... | {"file_size_mb": 146.57, "page_label": "20", "uploaded_via": "batch_uploader", "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "producer": "PDFium", "file_type": ".pdf", "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517de72c71db6", "creator": "PDFium", "creation... |
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returns to its normal state. (credit: Alex Lomas)
LINK T O LE ARNING
Watch thisvideo(http://openstax.org/l/thigmonasty)to see how the sensitive plant responds to a touch stimulus.
Rep... | {"source_file": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "total_pages": 615, "batch_upload": true, "page": 21, "creator": "PDFium", "creation_date": "D:20251101002707", "creationdate": "D:20251101002707", "uploaded_via": "batch_uploader", "upload_timestamp": "2025-11-06T07:48:19.0783... |
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-0.0... | belong to the same species and will have characteristics similar to the parent, such as fur color and blood type.
Adaptation
All living organisms exhibit a “fit” to their environment. Biologists refer to this fit as adaptation and it is a
consequence of evolution by natural selection, which operates in every lineage of... | {"creation_date": "D:20251101002707", "uploaded_via": "batch_uploader", "creator": "PDFium", "upload_timestamp": "2025-11-06T07:48:19.078368", "creationdate": "D:20251101002707", "file_type": ".pdf", "producer": "PDFium", "batch_upload": true, "file_size_mb": 146.57, "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b... |
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Growth and Development
Organisms grow and develop according to specific instructions coded for by their genes. These genes provide
instructions that will direct cellular growth and development, ensuring that a species’ young (Figure 1.4) will grow
up to exhibit many of the same charac... | {"uploaded_via": "batch_uploader", "creation_date": "D:20251101002707", "page_label": "21", "file_size_mb": 146.57, "file_type": ".pdf", "upload_timestamp": "2025-11-06T07:48:19.078368", "creator": "PDFium", "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "producer": "PDFium", "fi... |
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(credit: Pieter & Renée Lanser)
Regulation/Homeostasis
Even the smallest organisms are complex and require multiple regulatory mechanisms to coordinate internal
functions, such as the ... | {"total_pages": 615, "file_type": ".pdf", "producer": "PDFium", "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517de72c71db6", "creation_date": "D:20251101002707", "source_file": "downloads\\education\\academic_tuto... |
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0.015980... | diverse chemicals. These conditions may, however, change from one moment to the next. Organisms are able to
maintain homeostatic internal conditions within a narrow range almost constantly, despite environmental changes,
by activation of regulatory mechanisms. For example, many organisms regulate their body temperature... | {"page_label": "22", "producer": "PDFium", "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "uploaded_via": "batch_uploader", "upload_timestamp": "2025-11-06T07:48:19.078368", "creationdate": "D:20251101002707", "file_size_mb": 146.57, "batch_upload": true, "file_type": ".pdf", "cr... |
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Energy Processing
All organisms (such as the California condor shown inFigure 1.6) use a source of energy for their metabolic
activities. Some organisms capture energy from the Sun and convert it into chemical energy ... | {"total_pages": 615, "upload_timestamp": "2025-11-06T07:48:19.078368", "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517de72c71db6", "file_size_mb": 146.57, "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "creationdate": "D:20251101002707", "batch_upload": true,... |
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condors are an endangered species; scientists have strived to place a wing tag on each bird to help them identify and locate each individual
bird. (credit: Pacific Southwest Regio... | {"source_file": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "uploaded_via": "batch_uploader", "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517de72c71db6", "producer": "PDFium", "creationdate": "D:20251101002707", "batch_upload": true, "page_label": "23", "upload_time... |
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0.02879592... | the smallest and most fundamental unit of matter that retains the properties of an element. It consists of a nucleus
surrounded by electrons. Atoms form molecules. Amoleculeis a chemical structure consisting of at least two atoms
held together by a chemical bond. Many molecules that are biologically important aremacrom... | {"uploaded_via": "batch_uploader", "upload_timestamp": "2025-11-06T07:48:19.078368", "total_pages": 615, "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "batch_upload": true, "creationdate": "D:20251101002707", "file_name": "Concepts of Biology.pdf", "source_file": "downloads\\edu... |
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LINK T O LE ARNING
To see an animation of this DNA molecule, clickhere(http://openstax.org/l/rotating_DNA2).
Some cells contain aggregates of macromolecules surrounded by membranes; these are calledorganel... | {"creation_date": "D:20251101002707", "file_type": ".pdf", "page_label": "24", "creationdate": "D:20251101002707", "source_file": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "file_name": "Concepts of Biology.pdf", "batch_upload": true, "upload_timestamp": "2025-11-06T07:48:19.078368", "... |
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0.046572... | single cell and others are multicellular. Cells are classified as prokaryotic or eukaryotic.Prokaryotesare single-
celled organisms that lack organelles surrounded by a membrane and do not have nuclei surrounded by nuclear
membranes; in contrast, the cells ofeukaryotesdo have membrane-bound organelles and nuclei.
In mo... | {"uploaded_via": "batch_uploader", "creationdate": "D:20251101002707", "source_file": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "producer": "PDFium", "creator": "PDFium", "upload_timestamp": "2025-1... |
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prokaryotes and single-celled eukaryotes are also considered organisms and are typically referred to as
microorganisms.
10 1 • Introduction to Biology
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FIGURE 1.8 From an atom to the entire Earth, biology examines all aspects of life. (credit "molecule": modification of work by Jane
Whitney; credit "organelles": modification of work by Louisa Howard; credit "cells": modification of work by Bruce Wetzel, Harry Schaefer,
National Cancer Institute; cr... | {"file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517de72c71db6", "creator": "PDFium", "creationdate": "D:20251101002707", "page": 25, "uploaded_via": "batch_uploader", "creation_date": "D:20251101002707", "batch_upload": true, "file_size_mb": 146.57, "total_pages": 615, "file_type": ".pdf", "source": "... |
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c. Organelles exist within cells which exist within tissues.
d. Communities exist within ecosystems which exist in the biosphere.
All the individuals of a species living within a specific area are collectively called apopulation. For example, a fore... | {"batch_upload": true, "total_pages": 615, "uploaded_via": "batch_uploader", "producer": "PDFium", "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517de72c71db6", "creationdate": "D:20251101002707", "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "creator": "PDFiu... |
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0.0600... | forest’s community. The forest itself is an ecosystem. Anecosystemconsists of all the living things in a particular
area together with the abiotic, or non-living, parts of that environment such as nitrogen in the soil or rainwater. At
the highest level of organization (Figure 1.8), thebiosphereis the collection of all ... | {"page_label": "26", "upload_timestamp": "2025-11-06T07:48:19.078368", "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517de72c71db6", "file_name": "Concepts of Biology.pdf", "page": 26, "creation_date": "D:202511010... |
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hierarchical taxonomy. In this system, species that are most similar to each other are put together within a grouping
known as a genus. Furthermore, similar genera (the plural of genus) are put together ... | {"file_name": "Concepts of Biology.pdf", "upload_timestamp": "2025-11-06T07:48:19.078368", "creationdate": "D:20251101002707", "producer": "PDFium", "batch_upload": true, "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517de72c71db6", "creation_date": "D:20251101002707", "source": "downloads\\education... |
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The highest level, domain, is a relatively new addition to the system since the 1970s. Scientists now recognize three
domains of life, the Eukarya, the Archaea, and the Bacteria. The domain Eukarya contains organisms that have cells
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This dramatic change in our knowledge of the tree of life demonstrates that classifications are not permanent and
will change when new information becomes available.
12 1 • Introduction to Biology
Access ... | {"batch_upload": true, "creator": "PDFium", "file_size_mb": 146.57, "page_label": "26", "page": 26, "file_name": "Concepts of Biology.pdf", "source_file": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "uploaded_via": "batch_uploader", "file_type": ".pdf", "source": "downloads\\education\\... |
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now called the binomial naming system. Before Linnaeus, the use of common names to refer to organisms caused
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FIGURE 1.10 These images represent different domains. The scanning electron micrograph shows (a) bacterial cells belong to the domain
Bacteria, while the (b) extremophiles, seen all together as colored mats in this hot spring, belong to domain Archaea. Both the (c)... | {"upload_timestamp": "2025-11-06T07:48:19.078368", "file_name": "Concepts of Biology.pdf", "creation_date": "D:20251101002707", "source_file": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "file_type": ".pdf", "creationdate": "D:20251101002707", "creator": "PDFium", "file_size_mb": 146.57... |
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nodes, and branches. The internal nodes represent ancestors and are points in evolution when, based on scientific
evidence, an ancestor is thought to have diverged to form two new species. The length... | {"file_name": "Concepts of Biology.pdf", "creationdate": "D:20251101002707", "producer": "PDFium", "upload_timestamp": "2025-11-06T07:48:19.078368", "page_label": "27", "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517de72c71db6", "batch_upload": true, "total_pages": 615, "file_size_mb": 146.57, "cre... |
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separation of living organisms into three domains: Bacteria, Archaea, and Eukarya. Bacteria and Archaea are organisms without a nucleus
or other organelles surrounded by a membrane and, theref... | {"file_type": ".pdf", "creator": "PDFium", "page_label": "28", "page": 28, "file_size_mb": 146.57, "uploaded_via": "batch_uploader", "source_file": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "file_name": "Concepts of Biology.pdf", "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050... |
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0.... | broad branch itself, and depending on the subject of study, there are also microbial physiologists, ecologists, and
geneticists, among others.
Another field of biological study, neurobiology, studies the biology of the nervous system, and although it is
considered a branch of biology, it is also recognized as an interd... | {"file_name": "Concepts of Biology.pdf", "page_label": "28", "file_type": ".pdf", "creationdate": "D:20251101002707", "batch_upload": true, "file_size_mb": 146.57, "uploaded_via": "batch_uploader", "page": 28, "creation_date": "D:20251101002707", "producer": "PDFium", "upload_timestamp": "2025-11-06T07:48:19.078368", "... |
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study of animals and plants, respectively. Biologists can also specialize as biotechnologists, ecologists, or
physiologists, to name just a few areas. Biotechnologists apply the knowledge of biology t... | {"batch_upload": true, "source_file": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "page": 29, "upload_timestamp": "2025-11-06T07:48:19.078368", "total_pages": 615, "file_type": ".pdf", "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517de72c71db6", "creator": "PDFium", ... |
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0.... | knowledge of biology can benefit us in making decisions in our day-to-day lives.
The development of technology in the twentieth century that continues today, particularly the technology to
describe and manipulate the genetic material, DNA, has transformed biology. This transformation will allow
biologists to continue t... | {"file_type": ".pdf", "file_size_mb": 146.57, "total_pages": 615, "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "source_file": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "page": 29, "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab03... |
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0... | biology gained through this textbook and other printed and electronic media should be a benefit in whichever field
you enter.
CAREER C ONNE CTION
Forensic Scientist
Forensic science is the application of science to answer questions related to the law. Biologists as well as chemists
and biochemists can be forensic scien... | {"file_name": "Concepts of Biology.pdf", "producer": "PDFium", "batch_upload": true, "file_size_mb": 146.57, "creator": "PDFium", "total_pages": 615, "page": 29, "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517de72c71db6", "source_file": "downloads\\education\\academic_tutoring\\Biology\\Concepts of... |
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0.... | and assault. Their work involves analyzing samples such as hair, blood, and other body fluids and also processing
DNA (Figure 1.13) found in many different environments and materials. Forensic scientists also analyze other
biological evidence left at crime scenes, such as insect parts or pollen grains. Students who wan... | {"total_pages": 615, "file_size_mb": 146.57, "creationdate": "D:20251101002707", "uploaded_via": "batch_uploader", "creation_date": "D:20251101002707", "file_name": "Concepts of Biology.pdf", "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "source_file": "downloads\\education\\aca... |
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Scientific Ethics
Scientists must ensure that their efforts do not cause undue damage to humans, animals, or the environment. They
also must ensure that their research and communications are free of bias and that they properly balance financial,
legal, safety, replicability, and other consid... | {"source_file": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "creationdate": "D:20251101002707", "total_pages": 615, "page_label": "30", "creation_date": "D:20251101002707", "uploaded_via": "batch_uploader", "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517de72c71db6",... |
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0... | syphilis study, 399 African American men were diagnosed with syphilis but were never informed that they had the
disease, leaving them to live with and pass on the illness to others. Doctors even withheld proven medications
because the goal of the study was to understand the impact of untreated syphilis on Black men.
Wh... | {"page": 30, "file_type": ".pdf", "batch_upload": true, "page_label": "30", "producer": "PDFium", "source_file": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "file_size_mb": 146.57, "creator": "PDFium", "file_name": "Concepts of Biology.pdf", "upload_timestamp": "2025-11-06T07:48:19.0783... |
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Bioethics are not simple, and often leave scientists balancing benefits with harm. In this text and course, you will
discuss medical discoveries that, at their core, have what many consider an ethical lapse. In 1951, Henrietta Lacks,
a 30-year-old African American woman, was... | {"file_name": "Concepts of Biology.pdf", "uploaded_via": "batch_uploader", "batch_upload": true, "page": 30, "file_type": ".pdf", "creator": "PDFium", "creation_date": "D:20251101002707", "upload_timestamp": "2025-11-06T07:48:19.078368", "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.p... |
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0.042... | been credited for her role in those discoveries, and her family has not benefited from the billions of dollars in
pharmaceutical profits obtained partly through the use of her cells.
Today, harvesting tissue or organs from a dying patient without consent is not only considered unethical but also
illegal, regardless of ... | {"batch_upload": true, "creationdate": "D:20251101002707", "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "source_file": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "total_pages": 615, "producer": "PDFium", "upload_timestamp": "2025-11-06T07:48:19... |
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• Compare inductive reasoning with deductive reasoning
• Describe the goals of basic science and applied science
16 1 • Introduction to Biology
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0.0730... | FIGURE 1.14 Formerly called blue-green algae, the (a) cyanobacteria seen through a light microscope are some of Earth’s oldest life forms.
These (b) stromatolites along the shores of Lake Thetis in Western Australia are ancient structures formed by the layering of cyanobacteria
in shallow waters. (credit a: modificatio... | {"creator": "PDFium", "producer": "PDFium", "source_file": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "file_size_mb": 146.57, "page": 31, "upload_timestamp": "2025-11-06T07:48:19.078368", "file_type": ".pdf", "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517de72c71db... |
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0.103781... | mathematical reasoning, experimentation, and submitting conclusions to the scrutiny of others. Science also
requires considerable imagination and creativity; a well-designed experiment is commonly described as elegant, or
beautiful. Like politics, science has considerable practical implications and some science is dedi... | {"page_label": "31", "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "file_name": "Concepts of Biology.pdf", "source_file": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "total_pages": 615, "creationdate": "D:20251101002707", "producer": "PDFium", "b... |
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The Nature of Science
Biology is a science, but what exactly is science? What does the study of biology share with other scientific
disciplines?Science(from the Latinscientia,meaning "knowledge") can be defined as knowle... | {"creation_date": "D:20251101002707", "total_pages": 615, "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "file_type": ".pdf", "creator": "PDFium", "upload_timestamp": "2025-11-06T07:48:19.078368", "producer": "PDFium", "source_file": "downloads\\education\\academic_tutoring\\Biol... |
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experience that the methods of science cannot be applied to. These include such things as answering purely moral
questions, aesthetic questions, or what can be generally categorized as spiritual questions. ... | {"uploaded_via": "batch_uploader", "upload_timestamp": "2025-11-06T07:48:19.078368", "file_name": "Concepts of Biology.pdf", "creator": "PDFium", "page_label": "32", "page": 32, "creationdate": "D:20251101002707", "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "total_pages": 615,... |
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accepted scientific theory is thoroughly tested and confirmed explanation for a set of observations or phenomena.
Scientific theory is the foundation of scientific knowledge. In addition, in many scientif... | {"creator": "PDFium", "page_label": "32", "producer": "PDFium", "batch_upload": true, "upload_timestamp": "2025-11-06T07:48:19.078368", "page": 32, "file_size_mb": 146.57, "total_pages": 615, "file_type": ".pdf", "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517de72c71db6", "source": "downloads\\educ... |
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Natural Sciences
What would you expect to see in a museum of natural sciences? Frogs? Plants? Dinosaur skeletons? Exhibits about
how the brain functions? A planetarium? Gems and minerals? Or maybe all of the above? Science includes such
diverse field... | {"creator": "PDFium", "file_type": ".pdf", "source_file": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "page_label": "32", "batch_upload": true, "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517de72c71db6", "creationdate": "D:20251101002707", "page": 32, "creation_date... |
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There is no complete agreement when it comes to defining what the natural sciences include. For some experts, the
natural sciences are astronomy, biology, chemistry, earth science, and physics. Other scholars choose to divide
natural sciences intolife sciences, which study living things ... | {"file_type": ".pdf", "creationdate": "D:20251101002707", "creator": "PDFium", "file_name": "Concepts of Biology.pdf", "uploaded_via": "batch_uploader", "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "upload_timestamp": "2025-11-06T07:48:19.078368", "page_label": "32", "batch_upl... |
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Inductive reasoningis a form of logical thinking that uses related observations to arrive at a general conclusion.
This type of reasoning is common in descriptive science. A life scientist such as a biologist makes observations and
records them. Th... | {"file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517de72c71db6", "file_type": ".pdf", "producer": "PDFium", "batch_upload": true, "file_size_mb": 146.57, "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "upload_timestamp": "2025-11-06T07:48:19.078368", "source_file... |
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to be the part controlling the response to that task.
Deductive reasoning or deduction is the type of logic used in hypothesis-based science. In deductive reasoning, the
pattern of thinking moves in t... | {"creator": "PDFium", "page": 33, "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "file_type": ".pdf", "batch_upload": true, "source_file": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "producer": "PDFium", "total_pages": 615, "uploaded_via": "batch... |
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evidence that the climate change conclusion is a valid one.
Both types of logical thinking are related to the two main pathways of scientific study: descriptive science and
hypothesis-based science.Descriptive... | {"uploaded_via": "batch_uploader", "total_pages": 615, "page": 33, "producer": "PDFium", "file_size_mb": 146.57, "page_label": "33", "creationdate": "D:20251101002707", "creator": "PDFium", "file_name": "Concepts of Biology.pdf", "file_type": ".pdf", "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517d... |
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Hypothesis Testing
Biologists study the living world by posing questions about it and seeking science-based responses. This approach
is common to other sciences as well and is often referred to as the scientific method. The scientific method was
used even in ancient times, but it was... | {"batch_upload": true, "creator": "PDFium", "producer": "PDFium", "page_label": "33", "total_pages": 615, "file_type": ".pdf", "source_file": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "uploaded_via": "batch_uploader", "creation_date": "D:20251101002707", "creationdate": "D:20251101002... |
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Let’s think about a simple problem that starts with an observation and apply the scientific method to solve the
problem. One Monday morning, a student arrives at class and quickly discovers that the clas... | {"file_type": ".pdf", "total_pages": 615, "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "page": 34, "page_label": "34", "producer": "PDFium", "batch_upload": true, "file_size_mb": 146.57, "uploaded_via": "batch_uploader", "creation_date": "D:20251101002707", "upload_timestamp": ... |
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conditioning doesn’t work.”
Once a hypothesis has been selected, a prediction may be made. A prediction is similar to a hypothesis but it
typically has the format “If . . . then . . . .” For example, the pred... | {"creator": "PDFium", "batch_upload": true, "file_name": "Concepts of Biology.pdf", "file_type": ".pdf", "page_label": "34", "creationdate": "D:20251101002707", "upload_timestamp": "2025-11-06T07:48:19.078368", "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "producer": "PDFium", ... |
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will conduct one or more experiments designed to eliminate one or more of the hypotheses. This is important. A
hypothesis can be disproven, or eliminated, but it can never be proven. Science does not dea... | {"source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "creation_date": "D:20251101002707", "page": 34, "creationdate": "D:20251101002707", "file_size_mb": 146.57, "page_label": "34", "producer": "PDFium", "total_pages": 615, "upload_timestamp": "2025-11-06T07:48:19.078368", "file_hash"... |
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test the hypothesis that phosphate limits the growth of algae in freshwater ponds. A series of artificial ponds are
filled with water and half of them are treated by adding phosphate each week, while the oth... | {"creator": "PDFium", "total_pages": 615, "creationdate": "D:20251101002707", "source": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "producer": "PDFium", "file_size_mb": 146.57, "batch_upload": true, "upload_timestamp": "2025-11-06T07:48:19.078368", "file_type": ".pdf", "file_hash": "e0... |
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does not determine whether or not the other hypotheses can be accepted; it simply eliminates one hypothesis that
is not valid (Figure 1.18). Using the scientific method, the hypotheses that are inconsistent... | {"file_name": "Concepts of Biology.pdf", "total_pages": 615, "uploaded_via": "batch_uploader", "file_size_mb": 146.57, "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517de72c71db6", "producer": "PDFium", "upload_timestamp": "2025-11-06T07:48:19.078368", "creation_date": "D:20251101002707", "source_fil... |
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FIGURE 1.18 The scientific method is a series of defined steps that include experiments and careful observation. If a hypothesis is not
supported by data, a new hypothesis can be proposed.
In the example below, the scientific method is used to solve an everyday problem. Which part in the example bel... | {"creator": "PDFium", "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517de72c71db6", "producer": "PDFium", "file_size_mb": 146.57, "file_name": "Concepts of Biology.pdf", "page": 35, "upload_timestamp": "2025-11-06T07:48:19.078368", "total_pages": 615, "batch_upload": true, "source_file": "downloads\\... |
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0.0407348... | 5. I plug my coffeemaker into the outlet.
6. My coffeemaker works.
In practice, the scientific method is not as rigid and structured as it might at first appear. Sometimes an experiment
leads to conclusions that favor a change in approach; often, an experiment brings entirely new scientific questions
to the puzzle. Man... | {"creator": "PDFium", "upload_timestamp": "2025-11-06T07:48:19.078368", "file_name": "Concepts of Biology.pdf", "file_size_mb": 146.57, "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517de72c71db6", "source_file": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "creation_d... |
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0.067791... | if we can apply it to solving a specific problem or bettering our lives? This question focuses on the differences
between two types of science: basic science and applied science.
Basic scienceor “pure” science seeks to expand knowledge regardless of the short-term application of that
knowledge. It is not focused on dev... | {"batch_upload": true, "source_file": "downloads\\education\\academic_tutoring\\Biology\\Concepts of Biology.pdf", "file_name": "Concepts of Biology.pdf", "uploaded_via": "batch_uploader", "upload_timestamp": "2025-11-06T07:48:19.078368", "page": 36, "creationdate": "D:20251101002707", "creation_date": "D:2025110100270... |
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0.0430621... | disaster. In applied science, the problem is usually defined for the researcher.
Some individuals may perceive applied science as “useful” and basic science as “useless.” A question these people
might pose to a scientist advocating knowledge acquisition would be, “What for?” A careful look at the history of
science, ho... | {"creator": "PDFium", "uploaded_via": "batch_uploader", "creation_date": "D:20251101002707", "producer": "PDFium", "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6b050acdeab0389517de72c71db6", "file_size_mb": 146.57, "page": 36, "file_name": "Concepts of Biology.pdf", "upload_timestamp": "2025-11-06T07:48:19.078368"... |
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the knowledge generated through basic science.
One example of how basic and applied science can work together to solve practical problems occurred after the
discovery of DNA structure led to an understanding of... | {"creation_date": "D:20251101002707", "creationdate": "D:20251101002707", "batch_upload": true, "file_size_mb": 146.57, "total_pages": 615, "file_name": "Concepts of Biology.pdf", "uploaded_via": "batch_uploader", "producer": "PDFium", "file_type": ".pdf", "page": 36, "file_hash": "e0d8e64cc71418b4d6a1c0c5bd202a050d2c6... |
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