questions stringlengths 37 1.22k | reasoning stringlengths 0 3.56k ⌀ | answers stringlengths 4 138 |
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Long-term storage of what element occurs when matter from living organisms is buried deep underground and becomes fossilized?
Here are the choices:
A. hydrogen
B. oxygen
C. carbon
D. Nitrogen | Figure 20.11 Carbon dioxide gas exists in the atmosphere and is dissolved in water. Photosynthesis converts carbon dioxide gas to organic carbon, and respiration cycles the organic carbon back into carbon dioxide gas. Long-term storage of organic carbon occurs when matter from living organisms is buried deep undergroun... | C: carbon. |
Electron configurations are a shorthand method of indicating what subshells electrons occupy in these?
Here are the choices:
A. molecules
B. solutions
C. acids
D. atoms | Electron configurations are a shorthand method of indicating what subshells electrons occupy in atoms. | D: atoms. |
Light emitted by atoms is polychromatic—containing more than one of these?
Here are the choices:
A. filter
B. gravity
C. wavelength
D. weight | Lasers Most light emitted by atoms is polychromatic—containing more than one wavelength. In contrast, lasers (from light amplification by stimulated emission of radiation) emitmonochromatic light— a single wavelength only. Lasers have many applications in fiber-optic telecommunications, the reading and recording of com... | C: wavelength. |
What fatty material inside arteries can restrict blood flow in the artery?
Here are the choices:
A. cholesterol
B. marble
C. collagen
D. plaque | The fatty material inside the artery on the right is plaque. Notice how much narrower the artery has become. Less blood can flow through it than the normal artery. | D: plaque. |
What is used to record seismic waves?
Here are the choices:
A. topometer
B. transmitter
C. seismograph
D. odometer | A seismograph is a machine that records seismic waves. In the past, seismographs produced a seismogram . A seismogram is a paper record of the seismic waves the seismograph received. Seismographs have a weighted pen suspended from a stationary frame. A drum of paper is attached to the ground. As the ground shakes in an... | C: seismograph. |
What does a solar power plant turn sunlight into?
Here are the choices:
A. machinery
B. batteries
C. mechanical energy
D. electricity | Sunlight is turned into electricity at a solar power plant. A large group of mirrors focuses sunlight on one place. This place is called a receiver ( Figure below ). At the receiver, a liquid such as oil or water is heated to a high temperature. The liquid transfers its heat by conduction . In conduction, energy moves ... | D: electricity. |
Moving electrons have a form of kinetic energy called what?
Here are the choices:
A. electrical energy
B. potential energy
C. deformed energy
D. electromagnetism | Electrons are negatively charged particles in atoms. Moving electrons have a form of kinetic energy called electrical energy . If you’ve ever experienced an electric outage, then you know how hard it is to get by without electrical energy. Most of the electrical energy we use is produced by power plants and arrives in ... | A: electrical energy. |
Sunlight contains many different wavelengths, which you see when they separate into what?
Here are the choices:
A. charges
B. sounds
C. shadows
D. rainbow | Each kind of pigment absorbs specific wavelengths (colors) of light (dashed lines). Sunlight contains many different wavelengths, which you see when they separate into a rainbow. Not all colors of light are used in photosynthesis (solid line). Most plants, algae, and photosynthetic bacteria appear green because they re... | D: rainbow. |
The study of how organisms develop is known as?
Here are the choices:
A. physics
B. embryology
C. botany
D. ethology | Some of the oldest evidence of evolution comes from embryology , the study of how organisms develop. An embryo is an animal or plant in its earliest stages of development. This means looking at a plant or animal before it is born or hatched. Centuries ago, people recognized that the embryos of many different species ha... | B: embryology. |
What type of force always opposes the direction of motion?
Here are the choices:
A. binary friction
B. kinetic friction
C. harmonic friction
D. strong force | Kinetic friction acts between two surfaces that are in contact and in motion with respect to each other. This force reduces the acceleration and it always opposes the direction of motion. | B: kinetic friction. |
What kind of energy is released when the nucleus of an atom is split?
Here are the choices:
A. atomic
B. nuclear
C. kinetic
D. microwave | Nuclear energy is released when the nucleus of an atom is split. | B: nuclear. |
When did we learn there was a hole in the ozone layer?
Here are the choices:
A. 1980s
B. 1970s
C. 1990's
D. 1950s | Ozone near the ground harms human health. Ground-level ozone is a pollutant. But the ozone layer in the stratosphere protects us from harmful solar rays. That’s why people were alarmed in the 1980s to learn that there was a hole in the ozone layer. | A: 1980s. |
What type of generators use electromagnetic induction to change kinetic energy to electrical energy?
Here are the choices:
A. radiators
B. thermal generators
C. conductors
D. electric generators | Two important devices depend on electromagnetic induction: electric generators and electric transformers. Both devices play critical roles in producing and regulating the electric current we depend on in our daily lives. Electric generators use electromagnetic induction to change kinetic energy to electrical energy. Th... | D: electric generators. |
In the simple cubic system, the atoms or ions are located in which part of the cell?
Here are the choices:
A. corners
B. walls
C. plasma
D. mitochondria | Three unit cells of the cubic crystal system. Each sphere represents an atom or an ion. In the simple cubic system, the atoms or ions are at the corners of the unit cell only. In the face-centered unit cell, there are also atoms or ions in the center of each of the six faces of the unit cell. In the body-centered unit ... | A: corners. |
What are the earliest and simplest vertebrates?
Here are the choices:
A. birds
B. whales
C. fish
D. bears | The earliest and simplest vertebrates are fish. Fish also have the greatest number of vertebrate classes. Think about some of the fish you are familiar with, such as fish you eat or fish you may have seen in aquariums. | C: fish. |
Behaviors are responses to stimuli. they can either be instinctual/innate behaviors, which are not influenced by the environment, or learned behaviors, which are influenced by this?
Here are the choices:
A. spontaneous mutation
B. osmosis
C. inheritance
D. environmental changes | 45.7 Behavioral Biology: Proximate and Ultimate Causes of Behavior Behaviors are responses to stimuli. They can either be instinctual/innate behaviors, which are not influenced by the environment, or learned behaviors, which are influenced by environmental changes. Instinctual behaviors include mating systems and metho... | D: environmental changes. |
Gram-positive and gram-negative bacteria are distinguished by thickness of what?
Here are the choices:
A. cell wall
B. cell membrane
C. cell length
D. cell weight | Figure 13.6 Bacteria are divided into two major groups: Gram-positive and Gram-negative. Both groups have a cell wall composed of peptidoglycans: In Gram-positive bacteria, the wall is thick, whereas in Gram-negative bacteria, the wall is thin. In Gram-negative bacteria, the cell wall is surrounded by an outer membrane... | A: cell wall. |
What is common in muscles that have become exhausted by use?
Here are the choices:
A. clumps acid fermentation
B. Blood Acid Fermentation
C. vibration acid fermentation
D. lactic acid fermentation | Figure 4.16 Lactic acid fermentation is common in muscles that have become exhausted by use. | D: lactic acid fermentation. |
What is another term for the early larval stage of a frog?
Here are the choices:
A. tadpole
B. egg
C. young
D. ovary | The majority of amphibian species go through a larval stage that is very different from the adult form, as you can see from the frog in Figure below . The early larval, or tadpole , stage resembles a fish. It lacks legs and has a long tail, which it uses to swim. The tadpole also has gills to absorb oxygen from water. ... | A: tadpole. |
The release of an egg from an ovary, is part of what cycle?
Here are the choices:
A. fetal
B. life
C. menstrual
D. stomach | Ovulation , the release of an egg from an ovary, is part of the menstrual cycle , which typically occurs each month in a sexually mature female unless she is pregnant. Another part of the cycle is the monthly period, or menstruation. Menstruation is the process in which the endometrium of the uterus is shed from the bo... | C: menstrual. |
Which part of the body shows does horner's syndrome affect?
Here are the choices:
A. one eye
B. the tongue
C. the nose
D. the mouth | Horner’s syndrome is a condition that presents with changes in one eye, such as pupillary constriction and dropping of eyelids, as well as decreased sweating in the face. Why could a tumor in the thoracic cavity have an effect on these autonomic functions? 32. The cardiovascular center is responsible for regulating the... | A: one eye. |
In which way to vertebrates reproduces?
Here are the choices:
A. anally
B. sexually
C. biologically
D. asexually | Vertebrates reproduce sexually. Most have separate male and female sexes. Vertebrates have one of three reproductive strategies: ovipary, ovovivipary, or vivipary. | B: sexually. |
What contains more calcium than any other organ?
Here are the choices:
A. bones
B. lungs
C. gall bladder
D. fingernails | Storage. Bones store calcium. They contain more calcium than any other organ. Calcium is released by the bones when blood levels of calcium drop too low. The mineral, phosphorus is also stored in bones. | A: bones. |
One of the main features all vetebrates have in common is what?
Here are the choices:
A. hard shell
B. skeleton
C. backbone
D. brain | Vertebrates. From the smallest of fish to us. One of the main features we all have in common is our backbone. The Vertebrates chapter describes the biological features of fish, amphibians, reptiles, birds, and mammals. | C: backbone. |
Cytoplasmic determinants are distributed how in unfertilized eggs?
Here are the choices:
A. unevenly
B. from left to right
C. symmetrically
D. evenly | A: unevenly. | |
What relatively new addition to and highest level of the system of taxonomic classification includes just three divisions, the eukarya, the archaea, and the bacteria?
Here are the choices:
A. content
B. element
C. branch
D. domain | The highest level, domain, is a relatively new addition to the system since the 1990s. Scientists now recognize three domains of life, the Eukarya, the Archaea, and the Bacteria. The domain Eukarya contains organisms that have cells with nuclei. It includes the kingdoms of fungi, plants, animals, and several kingdoms o... | D: domain. |
What is only effective if ventilation is matched to blood flow through alveolar capillaries?
Here are the choices:
A. iron lung
B. blood pressur control
C. breathing control
D. assisted breathing | C: breathing control. | |
What sprouts up on stalks from the bed of moss gametophytes?
Here are the choices:
A. stomata
B. fibroblasts
C. monocots
D. sporophytes | Sporophytes sprout up on stalks from this bed of moss gametophytes. Notice that both the sporophytes and gametophytes exist at the same time. | D: sporophytes. |
Like all chordates, vertebrates are animals with four defining traits, at least during which stage?
Here are the choices:
A. pupal
B. larval
C. embryonic
D. adult | Like all chordates, vertebrates are animals with four defining traits, at least during the embryonic stage. The four traits are:. | C: embryonic. |
What occurs when two waves combine and cancel each other out?
Here are the choices:
A. destructive interference
B. terrible interference
C. primitive interference
D. molecular interference | Destructive interference occurs when two waves combine and cancel each other out. This occurs when a peak in one wave lines up with a trough in the other wave. | A: destructive interference. |
What occurs when the crests of one wave overlap the troughs, or lowest points, of another wave?
Here are the choices:
A. constructive interference
B. harmful interference
C. destructive interference
D. random interference | Destructive interference occurs when the crests of one wave overlap the troughs, or lowest points, of another wave. The Figure below shows what happens. As the waves pass through each other, the crests and troughs cancel each other out to produce a wave with zero amplitude. You can see an animation of destructive inter... | C: destructive interference. |
What system in both males and females consists of structures that produce reproductive cells, or gametes, and secrete sex hormone?
Here are the choices:
A. reproductive
B. digestion
C. immune system
D. circulatory system | The reproductive system in both males and females consists of structures that produce reproductive cells, or gametes, and secrete sex hormones. A gamete is a haploid cell that combines with another haploid gamete during fertilization. Sex hormones are chemical messengers that control sexual development and reproduction... | A: reproductive. |
What type of creature is noted for having its eyes at the tips of stalks or tentacles that emerge from its head?
Here are the choices:
A. arachnids
B. gastropods
C. arthropods
D. corals | B: gastropods. | |
What were the first animals to have true lungs and limbs for life on land?
Here are the choices:
A. reptiles
B. mammals
C. amphibians
D. birds | Amphibians were the first animals to have true lungs and limbs for life on land. However, they still had to return to water to reproduce. That’s because their eggs lacked a waterproof covering and would dry out on land. The first fully terrestrial vertebrates were amniotes. Amniotes are animals that produce eggs with i... | C: amphibians. |
What do they call 2,2,4-trimethylpentane in the gasoline industry?
Here are the choices:
A. xerophyte
B. methane
C. isooctane
D. spirogyra | In the gasoline industry, what is called isooctane is actually 2,2,4-trimethylpentane. Draw the structure of isooctane. | C: isooctane. |
What do we call any way that animals act, either alone or with other animals.
Here are the choices:
A. animal habits
B. animal behavior
C. animal communication
D. typical behavior | Animal behavior is any way that animals act, either alone or with other animals. | B: animal behavior. |
When waves of two different frequencies interfere, what phenomenon occurs?
Here are the choices:
A. soaking
B. beating
C. opening
D. making | When waves of two different frequencies interfere, a phenomenon known as beating occurs. The frequency of a beat is the difference of the two frequencies. | B: beating. |
Further transformation occurs during organogenesis, the formation of what?
Here are the choices:
A. arteries
B. bones
C. organs
D. muscles | C: organs. | |
Each antibody can bind with just one specific type of what, resulting in a signal for a phagocyte to destroy them?
Here are the choices:
A. adhesion
B. pathogen
C. antigen
D. immunogen | B cells respond to pathogens and other cells from outside the body in the blood and lymph. Most B cells fight infections by making antibodies. An antibody is a large, Y-shaped protein that binds to an antigen , a protein that is recognized as foreign. Antigens are found on the outside of bacteria, viruses and other for... | C: antigen. |
What kind of surface temperature is found on venus?
Here are the choices:
A. cool
B. a little hot
C. cold
D. extremely high | Venus is the second planet from the Sun and the closest planet to Earth, in distance and in size. Venus has a very thick, corrosive atmosphere, and the surface temperature is extremely high. | D: extremely high. |
What type of resource is limited in supply and cannot be replaced except over millions of years?
Here are the choices:
A. human resources
B. natural resource
C. capital resources
D. renewable energy | Natural resource that is limited in supply and cannot be replaced except over millions of years. | B: natural resource. |
The name of the cation comes first, followed by the name of the anion, in what kind of compound?
Here are the choices:
A. magnetic compound
B. covalent bonds
C. localized compound
D. ionic compound | Names of ionic compounds are derived from the names of the ions, with the name of the cation coming first, followed by the name of the anion. If an element can form cations of different charges, there are two alternate systems for indicating the compound’s name. In the Stock system, a roman numeral in parentheses indic... | D: ionic compound. |
Electromagnetic radiation is a form of what?
Here are the choices:
A. fusion
B. fuel
C. wave
D. energy | Electromagnetic radiation is a form of energy. | D: energy. |
What are the cells or structures that detect sensations?
Here are the choices:
A. receptors
B. proteins
C. membranes
D. hormones | 14.1 | Sensory Perception By the end of this section, you will be able to: • Describe different types of sensory receptors • Describe the structures responsible for the special senses of taste, smell, hearing, balance, and vision • Distinguish how different tastes are transduced • Describe the means of mechanoreception... | A: receptors. |
What artificial process involves making an exact copy of a gene?
Here are the choices:
A. gene cloning
B. candidate cloning
C. material cloning
D. ribosome cloning | Gene cloning is making an exact copy of a gene. | A: gene cloning. |
Deer ticks are the vectors for what disease that affects humans?
Here are the choices:
A. malaria
B. lyme disease
C. dengue fever
D. ringworm | USDA, photo by Scott Bauer. Deer ticks are the vectors for Lyme disease . public domain. | B: lyme disease. |
A highway that switches back and forth as it climbs up a steep hillside, yeilding a much gentler slope, is an example of what simple machine?
Here are the choices:
A. lever
B. wheel
C. pulley
D. inclined plane | The highway above switches back and forth as it climbs up the steep hillside. The much gentler slope of the road makes it easier for vehicles to reach the top of the mountain. The highway is an example of an inclined plane. | D: inclined plane. |
The loss of too much blood may lead to shock of what system?
Here are the choices:
A. nervous
B. circulatory
C. heart
D. Circular | Circulatory Shock The loss of too much blood may lead to circulatory shock, a life-threatening condition in which the circulatory system is unable to maintain blood flow to adequately supply sufficient oxygen and other nutrients to the tissues to maintain cellular metabolism. It should not be confused with emotional or... | B: circulatory. |
What is the tectonic zone called where two plates come together?
Here are the choices:
A. convergent boundary
B. lateral boundary
C. paralleled boundary
D. precursors boundary | Describe and explain volcanic activity that occurs within oceanic and continental plates. | A: convergent boundary. |
The mild oxidation of thiols gives compounds called what?
Here are the choices:
A. dioxides
B. disulfides
C. carbonates
D. halides | Thiols (also called mercaptans), which are sulfur analogs of alcohols, have the general formula RSH. Methanethiol (also called methyl mercaptan), has the formula CH3SH. Ethanethiol (ethyl mercaptan) is the most common odorant for liquid propane (LP) gas. The mild oxidation of thiols gives compounds called disulfides. | B: disulfides. |
What is the structure in a diploid sporophyte that undergoes meiosis to form haploid spores?
Here are the choices:
A. sporangium
B. dikaryotic
C. hyphae
D. hymenium | A general plant life cycle is represented by the diagram in Figure below . From the figure, you can see that the diploid sporophyte has a structure called a sporangium (plural, sporangia) that undergoes meiosis to form haploid spores. A spore develops into a haploid gametophyte. The gametophyte has male or female repro... | A: sporangium. |
Gene expression and what else are usually considered the same molecular process?
Here are the choices:
A. photosynthesis
B. organism synthesis
C. subtractive synthesis
D. protein synthesis | Gene expression and protein synthesis are usually considered the same molecular process. | D: protein synthesis. |
Centipedes have what on their foremost trunk segment, used to paralyze prey and aid in defense?
Here are the choices:
A. diploid claws
B. board claws
C. animal claws
D. poison claws | D: poison claws. | |
What paired organs together receive about 25 percent of cardiac output and are protected in the retroperitoneal space by the renal fat pad and overlying ribs and muscle?
Here are the choices:
A. brain
B. kidneys
C. lungs
D. hands | 25.3 Gross Anatomy of the Kidney As noted previously, the structure of the kidney is divided into two principle regions—the peripheral rim of cortex and the central medulla. The two kidneys receive about 25 percent of cardiac output. They are protected in the retroperitoneal space by the renal fat pad and overlying rib... | B: kidneys. |
The diversity of life on earth today is the result of what?
Here are the choices:
A. generation
B. mass extinction
C. evolution
D. spontaneous mutation | The diversity of life on Earth today is the result of evolution. Life began on Earth at least 3.5 to 4 billion years ago, and it has been evolving ever since. At first, all living things on Earth were simple, single-celled organisms. Much later, the first multicellular organisms evolved, and after that, Earth’s biodive... | C: evolution. |
In science, coefficients are used to balance what kind of equations?
Here are the choices:
A. isolated
B. liquid
C. mineral
D. chemical | Equations in chemistry must balance. There must be the same number of each type of atom in the products as there is in the reactants. Coefficients are used to balance chemical equations. They show how many atoms or molecules of a substance are involved in a reaction. | D: chemical. |
What connection is required for a newborn baby to begin breathing?
Here are the choices:
A. connection to a ventilator
B. connection to the placenta
C. connection to a heat source
D. connection to the father | Near the time of birth, the amniotic sac breaks in a gush of fluid. Often when this occurs, women say that their "water broke. " Labor usually begins within a day of this event. Labor involves contractions of the muscular walls of the uterus, which cause the cervix to dilate. With the mother’s help, the contractions ev... | B: connection to the placenta. |
How is population density expressed?
Here are the choices:
A. number per household
B. number per area
C. per arable land
D. arable land per capita | Ecologists look at many factors that help to describe a population. First, ecologists can measure the number of individuals that make up the population, known as population size . They can then determine the population density , which is the number of individuals of the same species in an area. Population density can b... | B: number per area. |
Type 1 diabetes results in the pancreas not being able to make what ?
Here are the choices:
A. glucose
B. insulin
C. sugar
D. hemoglobin | Type 1 diabetes occurs when the immune system attacks normal cells of the pancreas. Since the cells in the pancreas are damaged, the pancreas cannot make insulin. Type 1 diabetes usually develops in childhood or adolescence. | B: insulin. |
Photosynthesis produces oxygen as a byproduct, and respiration produces what as a byproduct?
Here are the choices:
A. carbon dioxide
B. nitrogen
C. carbon monoxide
D. ozone | 6O 2 + C 6 H 12 O 6 → 6CO 2 + 6H 2 O Photosynthesis produces oxygen as a byproduct, and respiration produces carbon dioxide as a byproduct. In nature, there is no such thing as waste. Every single atom of matter is conserved, recycling indefinitely. Substances change form or move from one type of molecule to another, b... | A: carbon dioxide. |
Volcanoes are termed active, dormant, or extinct depending on the possibility of the presence of what in chamber structures?
Here are the choices:
A. water
B. magma
C. coal
D. sulpher | Volcanoes may be active, dormant, or extinct. This depends on whether there is the possibility of magma in their magma chambers. | B: magma. |
Ciliary muscles control the shape of the lens, which bends light and focuses it on what?
Here are the choices:
A. the vitreous fluid
B. the pupil
C. the cornea
D. the retina | D: the retina. | |
Convection in which part of the earth drives the movement of the plates of lithosphere over the earth’s surface?
Here are the choices:
A. upper crust
B. ocean
C. mantle
D. atmosphere | Convection in the mantle drives the movement of the plates of lithosphere over the Earth’s surface. New oceanic crust forms at the ridge and pushes the older seafloor away from the ridge horizontally. | C: mantle. |
Simple eyes, like the human eye, have how many lenses?
Here are the choices:
A. one
B. two
C. none
D. four | The head generally has several simple eyes and a pair of compound eyes. Simple eyes have a single lens, like the human eye. Compound eyes have many lenses. | A: one. |
What are the most advanced group of seedless vascular plants called?
Here are the choices:
A. conifers
B. ferns
C. grasses
D. shrubs | The seedless vascular plants include club mosses, which are the most primitive; whisk ferns, which lost leaves and roots by reductive evolution; and horsetails and ferns. Ferns are the most advanced group of seedless vascular plants. They are distinguished by large leaves called fronds and small sporangia-containing st... | B: ferns. |
What is a rigid layer that surrounds the plasma membrane of a plant cell?
Here are the choices:
A. the cell center
B. mitochondria
C. the nucleic wall
D. the cell wall | The cell wall is a rigid layer that surrounds the plasma membrane of a plant cell. It supports and protects the cell. Tiny holes, or pores, in the cell wall allow water, nutrients, and other substances to move into and out of the cell. The cell wall is made up mainly of complex carbohydrates, including cellulose. | D: the cell wall. |
A tropism where light is the stimulus is known as what?
Here are the choices:
A. phototropism
B. Atropism
C. Thermotropism
D. Geotropism | You might have noticed that plants bend toward the light. This is an example of a tropism where light is the stimulus, known as phototropism ( Figure below ). To obtain more light for photosynthesis, leaves and stems grow toward the light. On the other hand, roots grow away from light. This is beneficial for the roots,... | A: phototropism. |
What is transmitted that makes up the electromagnetic spectrum?
Here are the choices:
A. light waves of different wavelengths
B. electromagnetic radiation in different wavelengths
C. sound waves of different frequencies
D. gamma rays | Electromagnetic radiation is energy transmitted as waves with different wavelengths. This makes up the electromagnetic spectrum. | B: electromagnetic radiation in different wavelengths. |
Rust is an example of the reaction of oxygen with what?
Here are the choices:
A. fuel
B. coal
C. carbon
D. iron | Reaction with Elements Oxygen reacts directly at room temperature or at elevated temperatures with all other elements except the noble gases, the halogens, and few second- and third-row transition metals of low reactivity (those with higher reduction potentials than copper). Rust is an example of the reaction of oxygen... | D: iron. |
When the sun is below the horizon and thus not visible on a direct line, the light path will bend slightly and thus make the sun visible by what?
Here are the choices:
A. refraction
B. thermal
C. reflection
D. infrared | Because air is slightly more optically dense than a vacuum, when sunlight passes from the vacuum of space into our atmosphere, it bends slightly towards the normal. When the sun is below the horizon and thus not visible on a direct line, the light path will bend slightly and thus make the sun visible by refraction. Obs... | A: refraction. |
What term describes a drug that has an effect on the central nervous system?
Here are the choices:
A. steroidal drug
B. elemental drug
C. nonaddictive drug
D. psychoactive drug | Caffeine is an example of a psychoactive drug. It is found in coffee and many other products (see Table below ). Caffeine is a central nervous system stimulant . Like other stimulant drugs, it makes you feel more awake and alert. Other psychoactive drugs include alcohol, nicotine, and marijuana. Each has a different ef... | D: psychoactive drug. |
What is the physical area where a specie lives?
Here are the choices:
A. marine biome
B. ecosystem
C. habitat
D. farmland | The habitat is the physical area where a species lives. Many factors are used to describe a habitat. The average amount of sunlight received each day, the range of annual temperatures, and average yearly rainfall can all describe a habitat. These and other abiotic factors will affect the kind of traits an organism must... | C: habitat. |
Where does most geologic activity take place?
Here are the choices:
A. plate boundaries
B. asthenosphere
C. outer core
D. inner core | Plate boundaries are where two plates meet. Most geologic activity takes place at plate boundaries. This activity includes volcanoes, earthquakes, and mountain building. The activity occurs as plates interact. How can plates interact? Plates can move away from each other. They can move toward each other. Finally, they ... | A: plate boundaries. |
What type of winds move the same way as mountain and valley breezes?
Here are the choices:
A. prevailing winds
B. pyroclastic winds
C. planetary winds
D. katabatic winds | Katabatic winds move the same way as mountain and valley breezes. However, they are much stronger. Katabatic winds form over a high plateau that is surrounded by mountains. In winter, the plateau grows cold. Air sinks through the gaps in the mountains. Over Antarctica and Greenland, these winds are frigid. | D: katabatic winds. |
What is the term for the length of the route between two points?
Here are the choices:
A. trajectory
B. area
C. distance
D. length | Distance is the length of the route between two points. The SI unit for distance is the meter (m). | C: distance. |
An individual with down's syndrome has 47 of what instead of the normal 46?
Here are the choices:
A. prokaryotes
B. ribosomes
C. mitochondria
D. chromosomes | 16.9 Human genetic disorders Down's Syndrome(Mongolism) Down's Syndrome is usually produced by the nondisjunction of chromosome 21 during oogenesis and sometimes during spermatogenesis. The individual suffering from this type of syndrome has 47 chromosomes instead of the normal 46. The extra chromosome is not a sex chr... | D: chromosomes. |
Where is the fruiting body normally produced in relation to the food source?
Here are the choices:
A. at the surface
B. at the root
C. underneath the surface
D. in the soil | The fruiting bodies are usually produced at the surface of the food source, rather than hidden within it. This allows the reproductive spores to be easily shed and carried away by the wind, water, or animals. The fruiting bodies are usually the only indication that a fungus is present. Like icebergs, the fruiting bodie... | A: at the surface. |
What is the largest of the sinuses?
Here are the choices:
A. Maxillary sinus
B. Sphenoid sinus
C. Frontal sinus
D. superior sagittal sinus | Venous Drainage of the Brain Circulation to the brain is both critical and complex (see Figure 20.37). Many smaller veins of the brain stem and the superficial veins of the cerebrum lead to larger vessels referred to as intracranial sinuses. These include the superior and inferior sagittal sinuses, straight sinus, cave... | D: superior sagittal sinus. |
As the temperature of water decreases what happens to the speed of the water molecules?
Here are the choices:
A. move faster
B. slow down
C. begin to boil
D. evaporate | In the liquid state, the hydrogen bonds of water can break and reform as the molecules flow from one place to another. When water is cooled, the molecules begin to slow down. Eventually, when water is frozen to ice, the hydrogen bonds become permanent and form a very specific network (see Figure below ). | B: slow down. |
Amines are weak bases due to the presence of a lone pair of what on the nitrogen atom?
Here are the choices:
A. atoms
B. nuclei
C. electrons
D. protons | Amines are weak bases due to the presence of a lone pair of electrons on the nitrogen atom. This lone pair can attract the hydrogen atom from a water molecule, causing the bond between it and the oxygen atom to break. The resultant products are the conjugate acid of the amine and the hydroxide ion. | C: electrons. |
Muscle groups are controlled by what mechanism?
Here are the choices:
A. activation energy
B. growth hormones
C. motor cortex
D. cerebral cortex | Figure 35.22 Different parts of the motor cortex control different muscle groups. Muscle groups that are neighbors in the body are generally controlled by neighboring regions of the motor cortex as well. For example, the neurons that control finger movement are near the neurons that control hand movement. | C: motor cortex. |
Deficiency of what mineral causes bones to become porous and weak?
Here are the choices:
A. zinc
B. calcium
C. potassium
D. magnesium | disease in which the bones become porous and weak because they do not contain enough calcium. | B: calcium. |
What is the apparatus used for carrying out an electrolysis reaction called?
Here are the choices:
A. electrolytic cell
B. reversible cell
C. biochemical cell
D. fluorescent cell | An electrolytic cell is the apparatus used for carrying out an electrolysis reaction. Figure below shows an electrolytic cell composed of Zn|Zn 2+ and Cu|Cu 2+ half-cells. | A: electrolytic cell. |
After what life stage does the fusion inside a star end?
Here are the choices:
A. red giant
B. yellow dwarf
C. blue giant
D. white dwarf | After a star becomes a red giant, it will take one of several different paths to end its life. Which path is followed by a star after the red giant phase depends on its mass. During the fusion life of a star, its size is the result of a competition between fusion heat pushing the material out and gravity pulling the ma... | A: red giant. |
What color is neptune?
Here are the choices:
A. blue
B. yellow
C. white
D. pink | Like Uranus, Neptune is blue. The blue color is caused by gases in its atmosphere, including methane. Neptune is not a smooth looking ball like Uranus. The planet has a few darker and lighter spots. When Voyager 2 visited Neptune in 1986, there was a large dark-blue spot south of the equator. This spot was called the G... | A: blue. |
What is it called when large objects are broken down into smaller pieces?
Here are the choices:
A. weathering
B. decay
C. evolution
D. metamorphosis | A: weathering. | |
What is the term for species in symbiotic relationships evolving together?
Here are the choices:
A. innervation
B. interconnection
C. autogeneration
D. coevolution | Evolution occurs in response to a change in the environment. Environmental change often involves other species of organisms. In fact, species in symbiotic relationships tend to evolve together. This is called coevolution . As one species changes, the other species must also change in order to adapt. | D: coevolution. |
Hemoglobin, with four polypeptide chains or subunits, is the most frequently cited example of a protein having what kind of structure?
Here are the choices:
A. unary
B. quaternary
C. binary
D. ternary | Four interactions stabilize the tertiary structure of a protein: (a) ionic bonding, (b) hydrogen bonding, (c) disulfide linkages, and (d) dispersion forces. When a protein contains more than one polypeptide chain, each chain is called asubunit. The arrangement of multiple subunits represents a fourth level of structure... | B: quaternary. |
What causes blood vessels to grow toward the tumour in cancer cells?
Here are the choices:
A. signaling molecules
B. communicating molecules
C. addressing molecules
D. harnessing molecules | A: signaling molecules. | |
What is igneous rock created from?
Here are the choices:
A. volcanic ash
B. magma cooling
C. magma aging
D. carbon dioxide | Igneous rocks cool from magma. The appearance of the rock is created by the composition of the magma. It is also determined by the rate that the magma cools. If the magma cools deep underground, it cools slowly. If the magma cools at or very near the surface, it cools quickly. This results in two different rock types. ... | B: magma cooling. |
What is the exchange of gases between the body and outside air?
Here are the choices:
A. metabolism
B. expulsion
C. respiration
D. secretion | Respiration is the exchange of gases between the body and the outside air. | C: respiration. |
What type of metal is a good conductor of electricity?
Here are the choices:
A. Aluminium
B. Tin
C. zinc
D. copper | Copper is a good conductor of electricity. That's why electric wires are often made of copper. They are covered with a protective coating of plastic, which does not conduct electricity. | D: copper. |
What is the study of ecosystems?
Here are the choices:
A. ecology
B. geology
C. botany
D. physics | Ecology is the study of ecosystems. An ecosystem consists of all the living and nonliving components of the habitat. Whereas nutrients and certain elements are recycled through ecosystems, energy moves in just one direction. Many interactions among species within an ecosystem are centered around the flow of energy. The... | A: ecology. |
Where do sperm go after leaving the testicles and before entering the vas deferens?
Here are the choices:
A. anus
B. epididymis
C. skin
D. clitoris | Which of the following statements about the male reproductive system is false? a. The vas deferens carries sperm from the testes to the penis. Sperm mature in seminiferous tubules in the testes. Both the prostate and the bulbourethral glands produce components of the semen. The prostate gland is located in the testes. ... | B: epididymis. |
What theory brings together continental drift and seafloor spreading?
Here are the choices:
A. theory of water tectonics
B. theory of plate tectonics
C. theory of order tectonics
D. theory of front tectonics | The theory of plate tectonics brings together continental drift and seafloor spreading. | B: theory of plate tectonics. |
Different forms of the same element are called what?
Here are the choices:
A. allotropes
B. amines
C. subclasses
D. polymorphs | Graphite is one of three forms of crystalline, or crystal-forming, carbon. Carbon also exists in an amorphous, or “shapeless,” form in substances such as coal and charcoal. Different forms of the same element are called allotropes. Besides graphite, the other allotropes of crystalline carbon are diamond and fullerenes.... | A: allotropes. |
What is the only marsupial in north america?
Here are the choices:
A. Raccoon
B. oppossum
C. Didelphinae
D. Marmosa | Most people think of opossums as scary creatures. Is this because they look kind of funny, walk kind of funny, have beady eyes and sharp teeth, and can emit a very foul odor? Maybe. But what is so different about opossums is that they are the only marsupial in North America. | B: oppossum. |
What is the generation of electricity using photovoltaic cells to split water molecules called?
Here are the choices:
A. photovoltaic cells
B. hybrid electricity
C. photoelectrolysis
D. aqua-electricity | With fossil fuels becoming more expensive and less available, scientists are looking for other energy sources. Hydrogen has long been considered an ideal source, since it does not pollute when it burns. The problem has been finding ways to generate hydrogen economically. One new approach that is being studied is photoe... | C: photoelectrolysis. |
What does the color of soil indicate?
Here are the choices:
A. chemical makeup
B. fertility
C. temperature
D. density | The color of soil indicates its fertility. Black or dark brown soils are rich in nitrogen and contain a high percentage of organic materials. Soils that are nitrogen poor and low in organic material might be gray, yellow, or red ( Figure below ). Soil with low organic material is not good for growing plants. | B: fertility. |
What kind of charge does a neutron have?
Here are the choices:
A. static
B. positive
C. neutral
D. negative | neutrons, which are neutral in electric charge. | C: neutral. |
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