questions stringlengths 37 1.22k | reasoning stringlengths 0 3.56k ⌀ | answers stringlengths 4 138 |
|---|---|---|
What do stored fats provide our body with for later use?
Here are the choices:
A. hydrogen
B. energy
C. metals
D. water | Fats are one type of lipid. Stored fat gives your body energy to use for later. It’s like having money in a savings account: it’s there in case you need it. Stored fat also cushions and protects internal organs. In addition, it insulates the body. It helps keep you warm in cold weather. | B: energy. |
What long molecules are composed of chains of units called monomers?
Here are the choices:
A. polymers
B. complexes
C. drummers
D. microbes | Polymers are long molecules composed of chains of units called monomers. | A: polymers. |
Where does an object gain or lose it's energy to during travel through a potential difference?
Here are the choices:
A. electric field
B. magnetic field
C. wave field
D. particle field | The energy that the object gains or loses when traveling through a potential difference is supplied (or absorbed) by the electric field --- there is nothing else there. Therefore, it follows that electric fields contain energy . | A: electric field. |
Where do biochemical reactions take place?
Here are the choices:
A. inside the organisms' cells
B. between cells
C. outside of cells
D. in atoms | Biochemical reactions are chemical reactions that take place inside the cells of organisms. | A: inside the organisms' cells. |
When fuel is burned, most of the energy is released in what form?
Here are the choices:
A. humidity
B. precipitation
C. heat
D. carbon dioxide | When fuel is burned, most of the energy is released as heat. Some of this heat can be used to do work. Heat cooks food or warms your house. Sometimes the heat is just waste heat. It still heats the environment, though. | C: heat. |
How are voltmeters placed in the circuit?
Here are the choices:
A. after parallel
B. in parallel
C. not parallel
D. since parallel | Voltmeters have high resistances and are placed in the circuit in parallel. | B: in parallel. |
What is an attitude of doubt about the truthfulness of claims that lack empirical evidence?
Here are the choices:
A. independent variable
B. speculation
C. conspiracy
D. skepticism | Skepticism is an attitude of doubt about the truthfulness of claims that lack empirical evidence. Scientific skepticism , also referred to as skeptical inquiry, questions claims based on their scientific verifiability rather than simply accepting claims based on faith or anecdotes. Scientific skepticism uses critical t... | D: skepticism. |
Cardiovascular disease, some types of cancer, type 2 diabetes, and obesity are considered what kind of preventable diseases?
Here are the choices:
A. lifestyle diseases
B. age diseases
C. environmental diseases
D. atmosphere diseases | Regular physical exercise is important in preventing lifestyle diseases such as cardiovascular disease, some types of cancer, type 2 diabetes, and obesity. Regular exercise also improves the health of the muscular system. Muscles that are exercised are bigger and stronger than muscles that are not exercised. | A: lifestyle diseases. |
What process is the primary function of the branching internal tubules called protonephridia?
Here are the choices:
A. calcification
B. thermoregulation
C. enculturation
D. osmoregulation | D: osmoregulation. | |
Which law means that the simplest of competing theories is most likely to be correct?
Here are the choices:
A. law of parsimony
B. Newton's law
C. Law of Conservation
D. Murphy's Law | The formation of scientific theories is generally guided by the law of parsimony. According to this law, the simplest of competing theories is most likely to be correct. | A: law of parsimony. |
Iron will do what when it is exposed to oxygen and water?
Here are the choices:
A. rust
B. expand
C. contract
D. become hot | Perhaps the most familiar example of corrosion is the formation of rust on iron. Iron will rust when it is exposed to oxygen and water. The main steps in the rusting of iron appear to involve the following (Figure 17.17). Once exposed to the atmosphere, iron rapidly oxidizes. anode: Fe(s) ⟶ Fe 2+(aq) + 2e −. | A: rust. |
About how many days does it take the moon to make one orbit around the earth?
Here are the choices:
A. 21
B. 22
C. 30
D. 28 | The Moon does not produce any light of its own. It only reflects light from the Sun. The Moon has phases because it orbits around Earth. One orbit takes about 28 days. As the moon moves around Earth, different parts of it appear to be lit up by the Sun. The Moon sometimes appears fully lit and sometimes completely dark... | D: 28. |
The most common two-lens telescope, like the simple microscope, uses lenses of what shape?
Here are the choices:
A. cylindrical
B. concave
C. angular
D. convex | The most common two-lens telescope, like the simple microscope, uses two convex lenses and is shown in Figure 26.23(b). The object is so far away from the telescope that it is essentially at infinity compared with the focal lengths of the lenses ( d o ≈ ∞ ). The first image is thus produced at. | D: convex. |
Glucose, galactose, and fructose are all what?
Here are the choices:
A. hexoses
B. alucoxes
C. fluxes
D. structoxes | Figure 3.5 Glucose, galactose, and fructose are all hexoses. They are structural isomers, meaning they have the same chemical formula (C6H12O6) but a different arrangement of atoms. | A: hexoses. |
Which property can you study by comparing the mass of an object relative to its size?
Here are the choices:
A. motion
B. density
C. weight
D. volume | A golf ball and a table tennis ball are about the same size. However, the golf ball is much heavier than the table tennis ball. Now imagine a similar size ball made out of lead. That would be very heavy indeed! What are we comparing? By comparing the mass of an object relative to its size, we are studying a property ca... | B: density. |
What term means the percent by mass of each element in a compound?
Here are the choices:
A. molecular composition
B. percent composition
C. mass composition
D. calculated composition | Chemists often need to know what elements are present in a compound and in what percentage. The percent composition is the percent by mass of each element in a compound. It is calculated in a similar way that we just indicated for the peanut butter. | B: percent composition. |
The combined gas law involves three properties of a gas - volume, absolute temperature, and what?
Here are the choices:
A. power
B. time
C. pressure
D. direction | To this point, we have examined the relationships between any two of the variables of , , and , while the third variable is held constant. However, situations arise where all three variables change. The combined gas law expresses the relationship between the pressure, volume, and absolute temperature of a fixed amount ... | C: pressure. |
What is the force of attraction that holds together positive and negative ions?
Here are the choices:
A. ionic bond
B. magnetic bond
C. electron bond
D. integral bond | An ionic bond is the force of attraction that holds together positive and negative ions. It forms when atoms of a metallic element give up electrons to atoms of a nonmetallic element. The Figure below shows how this happens. | A: ionic bond. |
In the lungs, bicarbonate is transported back into the red blood cells in exchange for what?
Here are the choices:
A. chloride
B. phosphate
C. oxygen
D. glucose | 39.4 Transport of Gases in Human Bodily Fluids Hemoglobin is a protein found in red blood cells that is comprised of two alpha and two beta subunits that surround an iron-containing heme group. Oxygen readily binds this heme group. The ability of oxygen to bind increases as more oxygen molecules are bound to heme. Dise... | A: chloride. |
What is defined as an organism in the earliest stages of development?
Here are the choices:
A. an nucleus
B. an embryo
C. a zygote
D. a gamete | An embryo is an organism in the earliest stages of development. Embryos of different species may look quite similar, even when the adult forms look very different. Look at the drawings of embryos in Figure below . They represent very early life stages of a chicken, turtle, pig, and human being. The embryos look so simi... | B: an embryo. |
Microevolution occuring and taking place over many generations results in?
Here are the choices:
A. macroevolution
B. recalibration
C. microinjection
D. fission | Macroevolution occurs over geologic time above the level of the species. The fossil record reflects this level of evolution. It results from microevolution taking place over many generations. | A: macroevolution. |
What do craters and rifts become when they fill with water?
Here are the choices:
A. streams
B. lakes
C. seas
D. rivers | Left: Indrik myneur; Right: Courtesy of UNEP/GRID. Craters and rifts become lakes when they fill with water . Left: CC BY 2.0; Right: Non-copyrighted and available for free use. | B: lakes. |
What system carries messages from sense organs and internal organs to the central nervous system?
Here are the choices:
A. auxiliary nervous system
B. peripheral nervous system
C. respiratory system
D. sensitive nervous system | The sensory division of the peripheral nervous system carries messages from sense organs and internal organs to the central nervous system. For example, it carries messages about images from the eyes to the brain. Once the messages reach the brain, the brain interprets the information. | B: peripheral nervous system. |
What disease is described as a respiratory disorder characterized by wheezing, coughing, and a feeling of constriction in the chest?
Here are the choices:
A. asthma
B. inflammation
C. indigestion
D. dementia | Respiratory system disorders are directly related to air pollution. These disorders have severe effects on human health, some leading to death directly related to air pollution. Air pollution related respiratory disorders include asthma, bronchitis, and emphysema. Asthma is a respiratory disorder characterized by wheez... | A: asthma. |
What is used to darken images of the sky?
Here are the choices:
A. polarizing filters
B. close-up filter
C. neutral density filter
D. uv filter | Photographs of the sky can be darkened by polarizing filters, a trick used by many photographers to make clouds brighter by contrast. Scattering from other particles, such as smoke or dust, can also polarize light. Detecting polarization in scattered EM waves can be a useful analytical tool in determining the scatterin... | A: polarizing filters. |
A tumor of what gland can cause hypersecretion of growth hormone?
Here are the choices:
A. pituitary gland
B. Pancreas
C. Parathyroid
D. tissues gland | Hypersecretion by an endocrine gland is often caused by a tumor. For example, a tumor of the pituitary gland can cause hypersecretion of growth hormone. If this occurs in childhood, it results in very long arms and legs and abnormally tall stature by adulthood. The condition is commonly known as gigantism (see Figure b... | A: pituitary gland. |
After the blood in the pulmonary capillaries becomes saturated with oxygen, it leaves the lungs and travels where?
Here are the choices:
A. to the heart
B. to the brain
C. to the kidneys
D. to the lungs | After the blood in the pulmonary capillaries becomes saturated with oxygen, it leaves the lungs and travels to the heart. The heart pumps the oxygen-rich blood into arteries, which carry it throughout the body. Eventually, the blood travels into capillaries that supply body tissues. These capillaries are called periphe... | A: to the heart. |
Depending on the surrounding conditions, normal matter usually exists as one of three phases: solid, liquid, or this?
Here are the choices:
A. fluid
B. ice
C. crystal
D. gas | Depending on the surrounding conditions, normal matter usually exists as one of three phases: solid, liquid, or gas. A phase change is a physical process in which a substance goes from one phase to another. Usually the change occurs when adding or removing heat at a particular temperature, known as the melting point or... | D: gas. |
What celestial bodies are classified by color and temperature, ranging from blue to red and hottest to coolest?
Here are the choices:
A. stars
B. galaxies
C. planets
D. astroids | Stars are classified by color and temperature. The most common system uses the letters O (blue), B (blue-white), A (white), F (yellow-white), G (yellow), K (orange), and M (red), from hottest to coolest. | A: stars. |
What carries small pollen grains farther than they otherwise would go?
Here are the choices:
A. humidity
B. birds
C. wind
D. steam | C: wind. | |
What do rocket-based systems use to propel itself into space?
Here are the choices:
A. water reactions
B. chemical reactions
C. nuclear reactions
D. hydrogen reactions | The space shuttle—and any other rocket-based system—uses chemical reactions to propel itself into space and maneuver itself when it gets into orbit. The rockets that lift the orbiter are of two different types. The three main engines are powered by reacting liquid hydrogen with liquid oxygen to generate water. Then the... | B: chemical reactions. |
What term simply means sensitive beyond normal levels of activation?
Here are the choices:
A. hyposensitivity
B. hypersensitivity
C. isosensitivity
D. monosensitivity | Hypersensitivities The word “hypersensitivity” simply means sensitive beyond normal levels of activation. Allergies and inflammatory responses to nonpathogenic environmental substances have been observed since the dawn of history. Hypersensitivity is a medical term describing symptoms that are now known to be caused by... | B: hypersensitivity. |
The hypothalamic releasing and inhibiting hormones are secreted near capillaries at the base of the what?
Here are the choices:
A. pancreas
B. lungs
C. hypothalamus
D. hippocampus | C: hypothalamus. | |
A microscope can be made from two of what kind of lenses?
Here are the choices:
A. inner
B. angular
C. convex
D. outer | 26.4 Microscopes Although the eye is marvelous in its ability to see objects large and small, it obviously has limitations to the smallest details it can detect. Human desire to see beyond what is possible with the naked eye led to the use of optical instruments. In this section we will examine microscopes, instruments... | C: convex. |
What produces almost one-half of the earth's oxygen through photosynthesis?
Here are the choices:
A. prokaryotes
B. arthropods
C. algae
D. protists | Humans could not live on Earth if it were not for protists. Why? Plant-like protists produce almost one-half of the oxygen on the planet through photosynthesis. Other protists decompose and recycle nutrients that humans need to live. All protists make up a huge part of the food chain. | D: protists. |
What is said to occur when both traits appear in a heterozygous offspring?
Here are the choices:
A. xenophobia
B. codominance
C. identical twins
D. pollenation | What happens when there are two alleles in a heterozygote and neither allele is completely dominant nor completely recessive? Can both traits appear in the phenotype? Essentially, yes they can. Can there be two dominant alleles for the same gene? Codominance occurs when both traits appear in a heterozygous offspring. F... | B: codominance. |
What type of response do signal transductions within target cells bring about?
Here are the choices:
A. bacterial
B. psychological
C. physiological
D. resporatory | C: physiological. | |
What happens to meteors as they fall through the mesosphere?
Here are the choices:
A. they burn
B. they bounce
C. they stop suddenly
D. they grow | Did you ever see a meteor shower, like the one in Figure below ? Meteors burn as they fall through the mesosphere. The space rocks experience friction with the gas molecules. The friction makes the meteors get very hot. Many meteors burn up completely in the mesosphere. | A: they burn. |
What are the three main types of rocks?
Here are the choices:
A. crystalline , igneous and metamorphic
B. sedimentary, igneous and metamorphic
C. limestone , igneous and metamorphic
D. plutonic, igneous and metmorphic | A geologic map shows the different rocks that are exposed at the surface of a region. Rock units are shown in a color identified in a key. On the geologic map of the Grand Canyon, for example, different rock types are shown in different colors. Some people call the Grand Canyon “layer cake geology“ because most of the ... | B: sedimentary, igneous and metamorphic. |
What is the only continent without amphibians?
Here are the choices:
A. antarctica
B. Australia
C. Africa
D. Europe | Amphibians can be found in freshwater and moist terrestrial habitats throughout the world. The only continent without amphibians is Antarctica. Amphibians are especially numerous in temperate lakes and ponds and in tropical rainforests. | A: antarctica. |
A hair grows out of a follicle and passes through what before extending above the skin surface?
Here are the choices:
A. epidermis
B. callus
C. dermis
D. cartilage | Hair follicles are structures where hairs originate. Each hair grows out of a follicle, passes up through the epidermis, and extends above the skin surface. | A: epidermis. |
What are the long, thin structures that protrude from the cell membrane and help single-celled organisms move or swim towards food?
Here are the choices:
A. tentacles
B. flagella
C. sporangia
D. microvilli | Flagella ( flagellum , singular) are long, thin structures that protrude from the cell membrane. Both eukaryotic and prokaryotic cells can have flagella. Flagella help single-celled organisms move or swim towards food. The flagella of eukaryotic cells are normally used for movement too, such as in the movement of sperm... | B: flagella. |
What is the unit of evolution?
Here are the choices:
A. the cell
B. dna
C. a phylum
D. the population | The population is the unit of evolution. | D: the population. |
What occurs where the water motion slows?
Here are the choices:
A. diffusion
B. erosion
C. vapor
D. deposition | Longshore drift continually moves sand along the shore. Deposition occurs where the water motion slows. The smallest particles, such as silt and clay, are deposited away from shore. This is where the water is calmer. Larger particles are deposited onshore. This is where waves and other motions are strongest. | D: deposition. |
The force on a charged particle in a magnetic field is always perpendicular to both its velocity vector and the?
Here are the choices:
A. track vector
B. field vector
C. position vector
D. gravity vector | Since the force on a charged particle in a magnetic field is always perpendicular to both its velocity vector and the field vector (check this using the second right hand rule above), a constant magnetic field will provide a centripetal force --- that is, a constant force that is always directed perpendicular to the di... | B: field vector. |
What is the process of removing wastes and excess water from the body called?
Here are the choices:
A. ingestion
B. diffusion
C. inspiration
D. excretion | Excretion is the process of removing wastes and excess water from the body. It is one of the major ways the body maintains homeostasis. Although the kidneys are the main organs of excretion, several other organs also excrete wastes. They include the large intestine, liver, skin, and lungs. All of these organs of excret... | D: excretion. |
What is the skeleton of the cell?
Here are the choices:
A. cell membrane
B. cell wall
C. cytoplasm
D. cytoskeleton | The cytoplasm consists of watery cytosol and cell structures. It has several functions. The cytoskeleton is the “skeleton” of the cell. It helps the cell keep its shape. | D: cytoskeleton. |
A salt concentration of 32 percent is nearly ten times that of what abundant resource?
Here are the choices:
A. oxygen
B. seawater
C. algae
D. fresh water | B: seawater. | |
Atoms of one element can be transformed into another through which process?
Here are the choices:
A. longer reactions
B. nuclear reactions
C. magnetic reactions
D. developed reactions | Not all atoms of an element must have precisely the same mass. Atoms of one element can be transformed into another through nuclear reactions. The compositions of many solid compounds are somewhat variable. Under certain circumstances, some atoms can be divided (split into smaller particles). These modifications illust... | B: nuclear reactions. |
Blood from the body enters what chamber of the heart before it is pumped to the right ventricle and then to the lungs?
Here are the choices:
A. left bivalve
B. left atrium
C. right atrium
D. left ventricle | Blood from the body enters the right atrium of the heart. The right atrium pumps the blood to the right ventricle, which pumps it to the lungs. This loop is represented by the blue arrows in Figure above . | C: right atrium. |
Dna replication, chromosome segregation, and the separation into two daughter cells are steps in what process?
Here are the choices:
A. binary fission
B. nuclear fission
C. reproductive fission
D. multiple fission | Binary fission can be described as a series of steps, although it is actually a continuous process. The steps are described below and also illustrated in Figure below . They include DNA replication, chromosome segregation, and finally the separation into two daughter cells. | A: binary fission. |
In science, what is defined as the transfer of energy from a vibrating object in waves that travel through matter?
Here are the choices:
A. photons
B. sound
C. energy
D. vibration | In science, sound is defined as the transfer of energy from a vibrating object in waves that travel through matter. Most people commonly use the term sound to mean what they hear when sound waves enter their ears. The tree above generated sound waves when it fell to the ground, so it made sound according to the scienti... | B: sound. |
Where in the cell does transcription occur?
Here are the choices:
A. nucleus
B. protoplasm
C. cell wall
D. epidermis | Transcription is the DNA → RNA part of the central dogma of molecular biology. It occurs in the nucleus. During transcription, a copy of mRNA is made that is complementary to a strand of DNA. In eukaryotes, mRNA may be modified before it leaves the nucleus. | A: nucleus. |
Hydrogen peroxide is commonly sold as a 3% by volume solution for use as a what?
Here are the choices:
A. antiseptic
B. disinfectant
C. detergent
D. surfactant | Hydrogen peroxide is commonly sold as a 3% by volume solution for use as a disinfectant. | B: disinfectant. |
In plants, pigment molecules absorb only visible light for photosynthesis. the visible light seen by humans as white light actually exists in a what?
Here are the choices:
A. invisible spectrum
B. vacuum
C. rainbow of colors
D. transparency | Absorption of Light Light energy enters the process of photosynthesis when pigments absorb the light. In plants, pigment molecules absorb only visible light for photosynthesis. The visible light seen by humans as white light actually exists in a rainbow of colors. Certain objects, such as a prism or a drop of water, di... | C: rainbow of colors. |
When an acid and base solutions react, they produce water and a neutral ionic compound known as what?
Here are the choices:
A. dirt
B. salt
C. pollen
D. sand | When acid and base solutions react, they produce water and a neutral ionic compound called a salt. The reaction is called a neutralization reaction. | B: salt. |
In the body, oxygen is used by cells of the body’s tissues and carbon dioxide is produced as what?
Here are the choices:
A. food
B. fuel
C. oxygen
D. waste product | Gas Exchange across the Alveoli In the body, oxygen is used by cells of the body’s tissues and carbon dioxide is produced as a waste product. The ratio of carbon dioxide production to oxygen consumption is the respiratory quotient (RQ). RQ varies between 0.7 and 1.0. If just glucose were used to fuel the body, the RQ w... | D: waste product. |
Chemical digestion in the small intestine cannot occur without the help of the pancreas and what bile-producing organ?
Here are the choices:
A. stomach
B. heart
C. liver
D. kidney | 23.6 Accessory Organs in Digestion: The Liver, Pancreas, and Gallbladder Chemical digestion in the small intestine cannot occur without the help of the liver and pancreas. The liver produces bile and delivers it to the common hepatic duct. Bile contains bile salts and phospholipids, which emulsify large lipid globules ... | C: liver. |
What property are alkali metals at room temperature?
Here are the choices:
A. liquid
B. mixed
C. solid
D. solid | Alkali metals are all solids at room temperature. They are relatively soft and low in density. | C: solid. |
What is the name of the smallest planet in our solar system, which is also nearest to the sun?
Here are the choices:
A. mars
B. mercury
C. earth
D. jupitor | Mercury is the smallest planet. It has no moon. It is also the planet closest to the Sun. Pictured below is the surface of Mercury covered with craters ( Figure below ), like Earth’s Moon. Many of the impact craters are billions of years old. This means that Mercury hasn’t changed much geologically for billions of year... | B: mercury. |
All gymnosperm species and many eudicot species undergo what?
Here are the choices:
A. third growth
B. exploitation
C. secondary growth
D. mutations | C: secondary growth. | |
Slow-twitch or fast-twitch and oxidative or glycolytic describe what type of fibers?
Here are the choices:
A. coronary muscle fibers
B. digestion muscle fibers
C. skeletal muscle fibers
D. capillaries | C: skeletal muscle fibers. | |
Plants have a touch response known as what?
Here are the choices:
A. thigmotropism
B. pollenation
C. trichina
D. photosynthesis | A: thigmotropism. | |
What is at the center of our solar system?
Here are the choices:
A. the Kuiper Belt
B. the sun
C. earth
D. the moon | The Sun is at the center of the solar system. | B: the sun. |
The different types of what systems work together to carry out all the life functions of the individual?
Here are the choices:
A. digestive systems
B. heartbeat systems
C. maturation systems
D. organ systems | Organ systems are organized into the organism. The different organ systems work together to carry out all the life functions of the individual. For example, cardiovascular and respiratory systems work together to provide the individual with oxygen and rid it of carbon dioxide. | D: organ systems. |
Why is uranus so faint?
Here are the choices:
A. polluted atmosphere
B. too small
C. too cold
D. far away | Uranus is faint because it is very far away. Its distance from the Sun is 2.8 billion kilometers (1.8 billion miles). A photon from the Sun takes about 2 hours and 40 minutes to reach Uranus. Uranus orbits the Sun once about every 84 Earth years. | D: far away. |
Which systems work together to provide cells with the oxygen they need for cellular respiration?
Here are the choices:
A. muscular and lymph systems
B. respiratory and lymph systems
C. respiratory and circulatory systems
D. circulatory and digestive systems | The respiratory and circulatory systems work together to provide cells with the oxygen they need for cellular respiration. Cells also need glucose for cellular respiration. Glucose is a simple sugar that comes from the food we eat. To get glucose from food, digestion must occur. This process is carried out by the diges... | C: respiratory and circulatory systems. |
What organs have tiny tubes leading to and from elastic air sacs that improve airflow and oxygen uptake?
Here are the choices:
A. liver
B. ovaries
C. lungs
D. apendix | C: lungs. | |
What is produced when sulfur and oxygen combine?
Here are the choices:
A. hydrogen oxide
B. sulfur oxide
C. Basic Oxides
D. Acidic oxides | Sulfur oxides are produced when sulfur and oxygen combine. This happens when coal that contains sulfur burns. | B: sulfur oxide. |
A skeleton that consists of hard, mineralized structures located within the soft tissue of organisms is called what?
Here are the choices:
A. endoskeleton
B. calcium deposits
C. exoskeleton
D. hydrostatic skeleton | Endoskeleton An endoskeleton is a skeleton that consists of hard, mineralized structures located within the soft tissue of organisms. An example of a primitive endoskeletal structure is the spicules of sponges. The bones of vertebrates are composed of tissues, whereas sponges have no true tissues (Figure 38.4). Endoske... | A: endoskeleton. |
What evolutionary process does not favor altruistic behavior that causes the death of the altruist?
Here are the choices:
A. random selection
B. natural selection
C. characteristic selection
D. flow selection | B: natural selection. | |
In seed plants, after fertilization, what will the ovule eventually develop into?
Here are the choices:
A. seed
B. flower
C. root
D. cone | An ovule is a female reproductive structure in seed plants that contains a tiny female gametophyte. The gametophyte produces an egg cell. After the egg is fertilized by sperm, the ovule develops into a seed. | A: seed. |
What is the message sent from the nucleus to the ribosome?
Here are the choices:
A. dna
B. mitochondria
C. rna
D. mrna | The mRNA is the message sent from the nucleus to the ribosome, the organelle of protein synthesis. Like a foreign language, the genetic code of the mRNA message must then be translated so that the ribosomes make the correct protein. The process of reading the code of a mRNA to make a protein is called translation. | D: mrna. |
The phagocytes that are part of the body’s second line of defense attack any of what that they encounter?
Here are the choices:
A. parasites
B. viruses
C. pathogens
D. vaccines | The phagocytes that are part of the body’s second line of defense attack any pathogens they encounter. They provide a general defense. Some white blood cells attack only certain pathogens. They provide a specific defense. | C: pathogens. |
Fungi are no longer classified as what, possessing cell walls made of chitin rather than cellulose?
Here are the choices:
A. plants
B. flowers
C. eukaryotes
D. roots | Today, fungi are no longer classified as plants. We now know that they have unique physical, chemical, and genetic traits that set them apart from plants and other eukaryotes. For example, the cell walls of fungi are made of chitin , not cellulose. Also, fungi absorb nutrients from other organisms, whereas plants make ... | A: plants. |
What kind of compounds are named for their positive metal ion first, followed by their negative nonmetal ion?
Here are the choices:
A. magnetic compounds
B. horizontal compounds
C. magnetic compounds
D. ionic compounds | Ionic compounds are named for their positive metal ion first, followed by their negative nonmetal ion. | D: ionic compounds. |
Endoscopes are used to explore the body through various orifices or these?
Here are the choices:
A. dermal tears
B. ocular cavity
C. major incisions
D. minor incisions | Bundles of fibers can be used to transmit an image without a lens, as illustrated in Figure 25.15. The output of a device called an endoscope is shown in Figure 25.15(b). Endoscopes are used to explore the body through various orifices or minor incisions. Light is transmitted down one fiber bundle to illuminate interna... | D: minor incisions. |
Bread has little holes in it from carbon dioxide produced by what?
Here are the choices:
A. bacteria
B. water
C. sugar
D. yeast | Bread has little holes in it from carbon dioxide produced by yeast. | D: yeast. |
What unit are atomic radii typically measured in?
Here are the choices:
A. powers
B. radons
C. picometers
D. sporozoans | Atomic radii have been measured for elements. The units for atomic radii are picometers, equal to 10 -12 meters. As an example, the internuclear distance between the two hydrogen atoms in an H 2 molecule is measured to be 74 pm. Therefore, the atomic radius of a hydrogen atom is . | C: picometers. |
What are fungus like protists?
Here are the choices:
A. slime molds and water lilies
B. lichen and kelp
C. water molds and mushrooms
D. slime molds and water molds | Examples of fungus-like protists include slime molds and water molds. | D: slime molds and water molds. |
Alpha, beta, and gamma emissions are associated with what kind of energy?
Here are the choices:
A. potential
B. kinetic
C. radiation
D. electrical | Alpha, beta, and gamma emissions have different abilities to penetrate matter. The relatively large alpha particle is easily stopped by matter (although it may impart a significant amount of energy to the matter it contacts). Beta particles penetrate slightly into matter, perhaps a few centimeters at most. Gamma rays c... | C: radiation. |
Transport of nutrients and regulation of body temperature through fluid flow are characteristics of which bodily system?
Here are the choices:
A. reproductive
B. cardiovascular
C. gastrointestinal
D. peripheral | Two horrific contraptions on frictionless wheels are compressing a spring by compared to its uncompressed (equilibrium) length. Each of the vehicles is stationary and they are connected by a string. The string is cut! Find the speeds of the vehicles once they lose contact with the spring. | B: cardiovascular. |
What are the two components of a mixture called?
Here are the choices:
A. concentration and a solvent
B. acid and base
C. solute and a solvent
D. nutrients and a solvent | Combinations of different substances are called mixtures. | C: solute and a solvent. |
Insulin is produced by what cells of the pancreas?
Here are the choices:
A. gamma
B. beta
C. alpha
D. platelet | Regulation of Blood Glucose Levels by Insulin and Glucagon Cells of the body require nutrients in order to function, and these nutrients are obtained through feeding. In order to manage nutrient intake, storing excess intake and utilizing reserves when necessary, the body uses hormones to moderate energy stores. Insuli... | B: beta. |
What is the arch called that forms when plasma of the sun flows along the loop that connects sunspots?
Here are the choices:
A. vertical prominence
B. solar prominence
C. large prominence
D. Energy prominence. | Another amazing feature on the Sun is solar prominences. Plasma flows along the loop that connects sunspots. This plasma forms a glowing arch. The arch is a solar prominence. Solar prominences can reach thousands of kilometers into the Sun’s atmosphere. Prominences can last for a day to several months. Prominences can ... | B: solar prominence. |
What does some amphibians have as juveniles but not as adults living on land?
Here are the choices:
A. lateral line system
B. kinetic line system
C. microscopic line system
D. vertical line system | A: lateral line system. | |
Ejaculation occurs when muscle contractions propel sperm from where?
Here are the choices:
A. cervix
B. penis
C. epididymes
D. urinary track | Sperm are released from the body during ejaculation. Ejaculation occurs when muscle contractions propel sperm from the epididymes. The sperm are forced through the ducts and out of the body through the urethra. As sperm travel through the ducts, they mix with fluids from the glands to form semen. Hundreds of millions o... | C: epididymes. |
Adult sea stars have what kind of symmetry?
Here are the choices:
A. hydrological symmetry
B. biological symmetry
C. radial symmetry
D. skeletal symmetry | Adult sea stars and other echinoderms have obvious radial symmetry. What evidence supports the claim that echinoderms evolved from an ancestor with bilateral symmetry?. | C: radial symmetry. |
The four types of light receptors include different types of cones and what else?
Here are the choices:
A. joints
B. quarks
C. rods
D. neutrons | 26.3 Color and Color Vision • The eye has four types of light receptors—rods and three types of color-sensitive cones. • The rods are good for night vision, peripheral vision, and motion changes, while the cones are responsible for central vision and color. • We perceive many hues, from light having mixtures of wavelen... | C: rods. |
In what do substances combine chemically to form a new substance?
Here are the choices:
A. suspension
B. compound
C. element
D. component | A mixture is a combination of two or more substances in any proportion. This is different from a compound, which consists of substances in fixed proportions. The substances in a mixture also do not combine chemically to form a new substance, as they do in a compound. Instead, they just intermingle and keep their origin... | B: compound. |
What is the colorless gas with a sharp, pungent odor used in smelling salts?
Here are the choices:
A. hydrogen
B. nitrogen
C. ammonia
D. helium | Ammonia is a colorless gas with a sharp, pungent odor. Smelling salts utilize this powerful odor. Gaseous ammonia readily liquefies to give a colorless liquid that boils at −33 °C. Due to intermolecular hydrogen bonding, the enthalpy of vaporization of liquid ammonia is higher than that of any other liquid except water... | C: ammonia. |
Groupings of related organs in the human body are referred to as "organ" what?
Here are the choices:
A. bodies
B. systems
C. conditions
D. functions | Human organ systems work together to carry out many of their functions. The skeletal and muscular systems are no exception. | B: systems. |
The enzymes that participate in fatty acid catabolism are located in what?
Here are the choices:
A. nucleus
B. atoms
C. mitochondria
D. carbohydrates | Like glucose, the fatty acids released in the digestion of triglycerides and other lipids are broken down in a series of sequential reactions accompanied by the gradual release of usable energy. Some of these reactions are oxidative and require nicotinamide adenine dinucleotide (NAD+) and flavin adenine dinucleotide (F... | C: mitochondria. |
Which organ of the body do large tapeworms attack or block?
Here are the choices:
A. intestines
B. liver
C. heart
D. kidneys | A: intestines. | |
The sternum and 12 pairs of ribs with their costal cartilages make up what?
Here are the choices:
A. thoracic cage
B. heart cage
C. chest cage
D. the core | Figure 7.32 Thoracic Cage The thoracic cage is formed by the (a) sternum and (b) 12 pairs of ribs with their costal cartilages. The ribs are anchored posteriorly to the 12 thoracic vertebrae. The sternum consists of the manubrium, body, and xiphoid process. The ribs are classified as true ribs (1–7) and false ribs (8–1... | A: thoracic cage. |
Which lipid is mainly responsible for narrowing arteries and causing the disease atherosclerosis?
Here are the choices:
A. cholesterol
B. unsaturated fat
C. saturated fat
D. monoglyceride | Although some lipids in the diet are essential, excess dietary lipids can be harmful. Because lipids are very high in energy, eating too many may lead to unhealthy weight gain. A high-fat diet may also increase lipid levels in the blood. This, in turn, can increase the risk for health problems such as cardiovascular di... | A: cholesterol. |
Physical or chemical changes are generally accompanied by a transfer of what?
Here are the choices:
A. energy
B. shape
C. pressure
D. color | When physical or chemical changes occur, they are generally accompanied by a transfer of energy. The law of conservation of energy states that in any physical or chemical process, energy is neither created nor destroyed. In other words, the entire energy in the universe is conserved. In order to better understand the e... | A: energy. |
What is the term for a dynamic equilibrium that is maintained in body tissues and organs?
Here are the choices:
A. homeostasis
B. dormancy
C. homogeneity
D. metabolism | 33.3 Homeostasis Homeostasis is a dynamic equilibrium that is maintained in body tissues and organs. It is dynamic because it is constantly adjusting to the changes that the systems encounter. It is in equilibrium because body functions are kept within a normal range, with some fluctuations around a set point for the p... | A: homeostasis. |
What has a pseudocoelom and hydrostatic skeleton?
Here are the choices:
A. omnivores
B. vertebrates
C. roundworms
D. gymnosperms | Roundworms make up the phylum Nematoda. They have a pseudocoelom and hydrostatic skeleton. Their body is covered with tough cuticle. Free-living roundworms are found mainly in freshwater habitats. Parasitic roundworms have a variety of hosts, including humans. | C: roundworms. |
In what two ways are volcanic eruptions characterized?
Here are the choices:
A. non-explosive and serious
B. localized and general
C. explosive and non-explosive
D. minor and explosive | Eruptions can be explosive or non-explosive. Only rarely do gentle and explosive eruptions happen in the same volcano. | C: explosive and non-explosive. |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.