questions stringlengths 37 1.22k | reasoning stringlengths 0 3.56k ⌀ | answers stringlengths 4 138 |
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Which ocean zone is the narrow strip along a coastline that is covered by water at high tide and exposed to air at low tide?
Here are the choices:
A. intertidal zone
B. deep zone
C. miniscule zone
D. calcareous zone | One of the most familiar ocean zones is the intertidal zone. This is the narrow strip along a coastline that is covered by water at high tide and exposed to air at low tide. You can see an example of an intertidal zone in Figure below . There are plenty of nutrients and sunlight in the intertidal zone. Producers here i... | A: intertidal zone. |
Elongation is the addition of what to the mrna strand?
Here are the choices:
A. nucleotides
B. filaments
C. glycine
D. codons | Elongation is the addition of nucleotides to the mRNA strand. | A: nucleotides. |
What is the distance north or south of the equator called?
Here are the choices:
A. longitude
B. latitude
C. Prime Meridian
D. inclination | Latitude is the distance north or south of the equator. It’s measured in degrees, from 0° to 90°. Several climate factors vary with latitude. | B: latitude. |
The force exerted by a diving board is conservative, provided the internal friction is this?
Here are the choices:
A. significant
B. intrinsic
C. static
D. negligible | 7.4 Conservative Forces and Potential Energy 9. What is a conservative force? 10. The force exerted by a diving board is conservative, provided the internal friction is negligible. Assuming friction is negligible, describe changes in the potential energy of a diving board as a swimmer dives from it, starting just befor... | D: negligible. |
Along with other elements, most ores are made of what?
Here are the choices:
A. coal
B. crystals
C. sodium
D. metal | When the ore leaves the mine, it is not yet a useful material ( Figure below ). Most ores are a combination of metal and other elements. The rocks are full of valuable minerals. They also contain rock that isn't valuable, which is called waste rock. The valuable minerals must be separated from the waste rock. | D: metal. |
The bottoms—but not the tops—of the wave slow down because of what?
Here are the choices:
A. size
B. friction
C. temperature
D. vibration | In shallow water close to shore, waves start to drag on the bottom of the water. The bottoms—but not the tops—of the wave slow down because of friction. This causes the waves to steepen until they break and fall over, carrying water onto the shore as surf. | B: friction. |
Molecular geometry is the three-dimensional arrangement of atoms in a what?
Here are the choices:
A. genes
B. nucleus
C. molecule
D. DNA | Molecular geometry is the three-dimensional arrangement of atoms in a molecule. The molecular geometry, or shape, of a molecule is an important factor that affects the physical and chemical properties of a compound. Those properties include melting and boiling points, solubility, density, and the types of chemical reac... | C: molecule. |
What mineral is used to produce glass?
Here are the choices:
A. lead
B. feldspar
C. quartz
D. pyrite | Silver is used to make sterling silver jewelry. Table salt is the mineral halite. Glass is produced from the mineral quartz. | C: quartz. |
What is caused by atoms or ions when they share or transfer valance electrons?
Here are the choices:
A. force of attraction
B. gain of charge
C. force of repulsion
D. loss of charge | No, not all birds can fly. And not all birds have wings. This penguin is a good example. Their wings have evolved into flippers, adapted for swimming instead of flying. The kiwi of New Zealand is another bird without wings. | A: force of attraction. |
Due to the time it takes for light to reach us, galaxies at the edge of the universe are distant in terms of space and what else?
Here are the choices:
A. energy
B. gravity
C. temperature
D. time | The galaxies at the edge of the Universe are a great distance away. But they are something else that is distant. Because it takes so long for light from so far away to reach us, they are also very far back in time ( Figure below ). | D: time. |
Some membrane proteins that actively transport ions contribute to what?
Here are the choices:
A. cellular potential
B. membrane potential
C. protein potential
D. organism potential | B: membrane potential. | |
In which human organ do the juveniles develop into sexually mature adults?
Here are the choices:
A. tissues
B. intestines
C. muscles
D. liver | B: intestines. | |
Both sexes of sockeye salmon turn red with green heads just prior to what?
Here are the choices:
A. migrating
B. feeding
C. spawning
D. dying | Wild male and female Sockeye salmon before spawning. Sockeye salmon are blue tinged with silver in color while living in the ocean. Just prior to spawning, both sexes turn red with green heads. Sockeye spawn mostly in streams having lakes in their watershed. The young fish spend up to three years in the freshwater lake... | C: spawning. |
While the numerical aperture can be used to compare resolutions of various objectives, it does not indicate how far the lens could be from the what?
Here are the choices:
A. microscope
B. diameter
C. focal point
D. specimen | While the numerical aperture can be used to compare resolutions of various objectives, it does not indicate how far the lens could be from the specimen. This is specified by the “working distance,” which is the distance (in mm usually) from the front lens element of the objective to the specimen, or cover glass. The hi... | D: specimen. |
Energy from the sun has a wide range of wavelengths.what is the total range of energy called?
Here are the choices:
A. light spectrum
B. thermal spectrum
C. electromagnetic spectrum
D. heat spectrum | Energy from the Sun has a wide range of wavelengths. The total range of energy is called the electromagnetic spectrum . You can see it in Figure below . | C: electromagnetic spectrum. |
When something loses electrons, it must also?
Here are the choices:
A. gain protons
B. slow down
C. gain electrons
D. reduce protons | Solution The charges, as well as the atoms, must balance in reactions. The silver atom is being oxidized from the 0 oxidation state to the 1+ state. Whenever something loses electrons, something must also gain electrons (be reduced) to balance the equation. Oxygen is a good oxidizing agent for these reactions because i... | C: gain electrons. |
Water and chemical elements that organisms need keep recycling through biogeochemical what?
Here are the choices:
A. levels
B. mutations
C. effects
D. cycles | Water and chemical elements that organisms need keep recycling through biogeochemical cycles. These cycles include biotic and abiotic components of ecosystems. | D: cycles. |
What is the most abundant biochemical compound, making up the cell walls of plants?
Here are the choices:
A. magnesium
B. cellulose
C. cytoplasm
D. mitochondria | Cellulose is the most abundant biochemical compound. It makes up the cell walls of plants and gives support to trunks and stems. Cellulose also provides needed fiber in the human diet. We can’t digest cellulose, but it helps keep food wastes moving through the digestive tract. | B: cellulose. |
What organisms use cilia, pseudopods, or flagella to move?
Here are the choices:
A. prokaryotes
B. arthropods
C. protists
D. bacteria | Protists use cilia, pseudopods, or flagella to move. | C: protists. |
During which phase do sister chromatids separate and the centromeres divide?
Here are the choices:
A. passivation
B. anaphase
C. cell phase
D. gap cycle | During anaphase , sister chromatids separate and the centromeres divide. The sister chromatids are pulled apart by the shortening of the spindle fibers. This is like reeling in a fish by shortening the fishing line. One sister chromatid moves to one pole of the cell, and the other sister chromatid moves to the opposite... | B: anaphase. |
What term describes a type of redox reaction in which the same substance is both oxidized and reduced?
Here are the choices:
A. disproportion
B. interposition
C. misappropriation
D. disapprobation | Disproportion is a type of redox reaction in which the same substance is both oxidized and reduced. Identify the element that is disproportionating and indicate the initial and final oxidation numbers of that element. 2CuCl(aq) → CuCl2(aq) + Cu(s) Saylor URL: http://www. saylor. org/books. | A: disproportion. |
Each organism inherits one of what item for each gene from each parent?
Here are the choices:
A. allele
B. phenotype
C. cell
D. molecule | A: allele. | |
What term is used to refer to the external female reproductive structures collectively?
Here are the choices:
A. uterus
B. vulva
C. vagina
D. cervix | External Female Genitals The external female reproductive structures are referred to collectively as the vulva (Figure 27.10). The mons pubis is a pad of fat that is located at the anterior, over the pubic bone. After puberty, it becomes covered in pubic hair. The labia majora (labia = “lips”; majora = “larger”) are fo... | B: vulva. |
Which state of matter has the lowest density?
Here are the choices:
A. liquids
B. gases
C. solids
D. fluids | Gases have much lower densities than liquids and solids. For example, liquid water is over 1000 times more dense than water vapor at STP. | B: gases. |
Skeletal, cardiac, and smooth are the three types of what cells and possess morphologies correlated with their functions?
Here are the choices:
A. organ
B. muscle
C. bone
D. cartilage tissue | 4.4 Muscle Tissue and Motion The three types of muscle cells are skeletal, cardiac, and smooth. Their morphologies match their specific functions in the body. Skeletal muscle is voluntary and responds to conscious stimuli. The cells are striated and multinucleated appearing as long, unbranched cylinders. Cardiac muscle... | B: muscle. |
What do glands in the skin produce to cool down the body?
Here are the choices:
A. lactic acid
B. mucus
C. sweat
D. saliva | glands in the skin that produce sweat, a salty fluid that helps cool down the body. | C: sweat. |
The only obvious difference between boys and girls at birth is what type of organs?
Here are the choices:
A. respiratory
B. reproductive
C. nervous
D. digestive | The only obvious difference between boys and girls at birth is their reproductive organs. However, even the reproductive organs start out the same in both sexes. | B: reproductive. |
Mammals have a number of kinds of thermoreceptors, each specific for a particular what?
Here are the choices:
A. oxygen range
B. weight range
C. temperature range
D. electrical range | C: temperature range. | |
With a shape that specially suits its function of sending nerve signals to other cells, the human nerve cell is an example of what?
Here are the choices:
A. maturation
B. adaptation
C. evolution
D. specialization | The human nerve cell in Figure below is a good example of a specialized animal cell. Its shape suits it for its function of sending nerve signals to other cells. A nerve cell couldn’t take this shape if it were surrounded by a rigid cell wall. | D: specialization. |
What is defined as the mass per unit volume of a substance?
Here are the choices:
A. height
B. density
C. weight
D. diameter | As you know, density is defined as the mass per unit volume of a substance. Since gases all occupy the same volume on a per mole basis, the density of a particular gas is dependent on its molar mass. A gas with a small molar mass will have a lower density than a gas with a large molar mass. Gas densities are typically ... | B: density. |
What reaction means, literally, “splitting with water"?
Here are the choices:
A. hydrolysis
B. fission
C. aqueous
D. hydroxis | Esters are neutral compounds, unlike the acids from which they are formed. In typical reactions, the alkoxy (OR′) group of an ester is replaced by another group. One such reaction is hydrolysis, literally “splitting with water. ” The hydrolysis of esters is catalyzed by either an acid or a base. Acidic hydrolysis is si... | A: hydrolysis. |
Approximately how much larger is the radius of an atom than that of its nucleus?
Here are the choices:
A. 10 times
B. 100 times
C. 1 times
D. 1000 times | The radius of an atom is approximately 10 times larger than the radius of its nucleus. If the radius of the nucleus were 1.0 cm, what would be the radius of the atom in centimeters? in miles?. | A: 10 times. |
What can be worn to protect hands and skin from harm?
Here are the choices:
A. masks
B. filters
C. gloves
D. splints | C: gloves. | |
What type of movements are produced when the angle between the bones of a joint changes?
Here are the choices:
A. oblong
B. circular
C. angular
D. microscopic | The wide range of movement allowed by synovial joints produces different types of movements. Angular movements are produced when the angle between the bones of a joint changes. Flexion, or bending, occurs when the angle between the bones decreases. Moving the forearm upward at the elbow is an example of flexion. Extens... | C: angular. |
What senses the movement of liquid in ear canals?
Here are the choices:
A. muscle cells
B. hair cells
C. Brain Cells
D. Ear Drum | This bottle of water models the semicircular canals in your ears. When you tip the bottle, the water moves up or down the sides of the bottle; when you tip your head, the liquid inside the semicircular canals moves up and down the sides of the canals. Tiny hair cells lining the canals sense the movement of liquid and s... | B: hair cells. |
What part of the brain regulates certain hormones associated with reproduction during breeding seasons?
Here are the choices:
A. hippocampus
B. frontal lobe
C. hypothalamus
D. thalamus | C: hypothalamus. | |
What is any nonmetallic, inorganic solid that is strong enough for use in structural applications called?
Here are the choices:
A. tissue
B. ceramic
C. glass
D. metallic | Ceramics A ceramic is any nonmetallic, inorganic solid that is strong enough for use in structural applications. Traditional ceramics, which are based on metal silicates or aluminosilicates, are the materials used to make pottery, china, bricks, and concrete. Modern ceramics contain a much wider range of components and... | B: ceramic. |
What is the outer layer of the sun made up of?
Here are the choices:
A. oxygen
B. nitrogen
C. gas
D. plasma | outermost layer of the sun, made up of a plasma that extends millions of kilometers into space. | D: plasma. |
Viruses may damage or kill cells by causing the release of hydrolytic enzymes from where?
Here are the choices:
A. lipids
B. lysosomes
C. glands
D. capillaries | B: lysosomes. | |
Species that have diverged from their common ancestors have greater differences in what?
Here are the choices:
A. immunology
B. dna sequence
C. life span
D. cell structure | Evidence from the fossil record can be combined with data from molecular clocks. A molecular clock uses DNA sequences (or the proteins they encode) to estimate relatedness among species. Molecular clocks estimate the time in geologic history when related species diverged from a common ancestor. Molecular clocks are bas... | B: dna sequence. |
In a fuel cell, energy is not stored; electrical energy is provided by what?
Here are the choices:
A. fusion reaction
B. carbon reaction
C. consumption reaction
D. chemical reaction | called an alkaline battery when adapted to operate under alkaline conditions. Button batteries have a high output-to-mass ratio; lithium–iodine batteries consist of a solid electrolyte; the nickel– cadmium (NiCad) battery is rechargeable; and the lead–acid battery, which is also rechargeable, does not require the elect... | D: chemical reaction. |
What substance comes toward earth's crust through mantle plumes?
Here are the choices:
A. magma
B. rocks
C. water
D. gas | Some volcanoes form over active hot spots . Scientists count about 50 hot spots on the Earth. Hot spots may be in the middle of a tectonic plate. Hot spots lie directly above a column of hot rock called a mantle plume . Mantle plumes continuously bring magma up from the mantle towards the crust ( Figure below ). | A: magma. |
A plant is composed of two main types of tissue: meristematic tissue and what other kind of tissue?
Here are the choices:
A. synovial tissue
B. nonvascular tissue
C. permanent tissue
D. muscle tissue | CHAPTER SUMMARY 30.1 The Plant Body A vascular plant consists of two organ systems: the shoot system and the root system. The shoot system includes the aboveground vegetative portions (stems and leaves) and reproductive parts (flowers and fruits). The root system supports the plant and is usually underground. A plant i... | C: permanent tissue. |
The smallest and lightest alcohols (methanol, ethanol, propanol) are completely soluble in?
Here are the choices:
A. water
B. argon
C. gasoline
D. oil | The smallest and lightest alcohols (methanol, ethanol, propanol) are completely soluble in water in all proportions. In a solution, the hydroxyl groups of alcohol molecules and the water molecules form hydrogen bonds with each other, resulting in complete miscibility. However, as the length of the carbon chain increase... | A: water. |
In which stage do chromosomes line up one on top of each other along the middle of the cell, similar to how they line up in mitosis?
Here are the choices:
A. chromosome ii
B. hectase ii
C. metaphase ii
D. cyclohexane ii | Metaphase II: The chromosomes line up one on top of each other along the middle of the cell, similar to how they line up in mitosis. The spindle is attached to the centromere of each chromosome. | C: metaphase ii. |
If the frequency of the electromagnetic wave is the same as the natural frequencies of the system, the transfer of what is much more efficient?
Here are the choices:
A. energy
B. light
C. heat
D. sound | 24.4 Energy in Electromagnetic Waves Anyone who has used a microwave oven knows there is energy in electromagnetic waves. Sometimes this energy is obvious, such as in the warmth of the summer sun. Other times it is subtle, such as the unfelt energy of gamma rays, which can destroy living cells. Electromagnetic waves ca... | A: energy. |
When are nutrients absorbed into the body?
Here are the choices:
A. before digestion
B. after digestion
C. after excretion
D. during digestion | D: during digestion. | |
What happens to the length of the days in the fall?
Here are the choices:
A. they get longer
B. they get shorter
C. they stay the same
D. they change randomly | For example, in the fall, when the days start to get shorter, the trees sense that there is less sunlight. The plant is stimulated, and it sends messages telling the leaves to change colors and fall. This is an example of photoperiodism , the reaction of organisms, such as plants, to the length of day or night. Photope... | B: they get shorter. |
Of the nine classes of vertebrates, how many are fish?
Here are the choices:
A. one
B. four
C. five
D. three | Of course. But what type? Of the nine classes of vertebrates, five are fish. Each of the five classes has distinguishing characteristics that allow members to be classified appropriately. Stingray are cartilaginous fish, related to sharks. | C: five. |
After fertilization is complete, no other sperm can enter. the fertilized ovule forms the seed, whereas the tissues of the ovary become this?
Here are the choices:
A. vegetables
B. plant
C. fruit
D. wheat | events in angiosperms are known as double fertilization (Figure 32.18). After fertilization is complete, no other sperm can enter. The fertilized ovule forms the seed, whereas the tissues of the ovary become the fruit, usually enveloping the seed. | C: fruit. |
What is a fluid-filled body cavity that is completely enclosed by mesoderm called?
Here are the choices:
A. hymenium
B. coelom
C. choroid
D. pseudocoelom | Later, a true coelom evolved. This is a fluid-filled body cavity that is completely enclosed by mesoderm. The coelom lies between the digestive cavity and body wall. You can see it in the invertebrate in Figure below . Modern invertebrates with a coelom include mollusks (Phylum Mollusca) and annelids (Phylum Annelida). | B: coelom. |
Which is the least massive outer planet?
Here are the choices:
A. uranus
B. mars
C. jupiter
D. venus | Uranus is the least massive outer planet. Its mass is only about 14 times the mass of Earth. Like all of the outer planets, Uranus is much less dense than Earth. Gravity is actually weaker than on Earth’s surface. If you were at the top of the clouds on Uranus, you would weigh about 10 percent less than what you weigh ... | A: uranus. |
The nervous system is characterized by electrical signals that are sent from one area to another. whether those areas are close or very far apart, the signal must travel along this?
Here are the choices:
A. hairs
B. axon
C. tendons
D. axial | 12.4 The Action Potential The nervous system is characterized by electrical signals that are sent from one area to another. Whether those areas are close or very far apart, the signal must travel along an axon. The basis of the electrical signal is the controlled distribution of ions across the membrane. Transmembrane ... | B: axon. |
What occurs when light reflects off a very smooth surface and forms a clear image?
Here are the choices:
A. refraction
B. absorption
C. projection
D. regular reflection | Regular reflection occurs when light reflects off a very smooth surface and forms a clear image. Diffuse reflection occurs when light reflects off a rough surface and forms a blurry image or no image at all. | D: regular reflection. |
The head of the sperm contains what, which holds the chromosomes?
Here are the choices:
A. nucleus
B. fiber
C. eggs
D. nerve cells | The head of the sperm contains the nucleus. The nucleus holds the chromosomes. In humans, the nucleus of a sperm cell contains 23 chromosomes. The acrosome on the head contains enzymes that help the sperm penetrate an egg. | A: nucleus. |
What system is responsible for defending your body against sickness?
Here are the choices:
A. nervous system
B. digestion system
C. circulatory system
D. immune system | Infectious diseases are diseases that spread from person to person. They are caused by pathogens such as bacteria, viruses or fungi. What can you do to avoid infectious diseases? Eating right and getting plenty of sleep are a good start. These habits will help keep your immune system healthy. With a healthy immune syst... | D: immune system. |
What effect occurs when a few individuals start, or found, a new population?
Here are the choices:
A. founder
B. pioneer
C. convergent
D. divergent | Founder effect occurs when a few individuals start, or found, a new population. By chance, allele frequencies of the founders may be different from allele frequencies of the population they left. An example is described in the Figure below . | A: founder. |
Each kidney is supplied by a renal artery and what else?
Here are the choices:
A. coronary artery
B. spinal cord
C. brain vein
D. renal vein | Each kidney is supplied by a renal artery and renal vein. | D: renal vein. |
What cell structures capture light energy from the sun and use it with water and carbon dioxide to produce sugars for food?
Here are the choices:
A. fibroblasts
B. chloroplasts
C. nuclei
D. ribosomes | Chloroplasts capture light energy from the sun and use it with water and carbon dioxide to produce sugars for food. Chloroplasts look like flat discs and are usually 2 to 10 micrometers in diameter and 1 micrometer thick. A model of a chloroplast is shown in Figure below . The chloroplast is enclosed by an inner and an... | B: chloroplasts. |
What is released when catabolic pathways break down complex molecules?
Here are the choices:
A. food
B. energy
C. hydrogen
D. oxygen | B: energy. | |
Mass and volume are examples of what kind of properties?
Here are the choices:
A. dynamic properties
B. extensive properties
C. exclusive properties
D. varied properties | Mass and volume are examples of extensive properties. | B: extensive properties. |
What technique is used by insects and birds to find food, mates, and safety from predators?
Here are the choices:
A. sleeping
B. playing
C. mating
D. flying | Other than insects, virtually no other animals can inhabit the airy world. Flying is a sure-fire way to escape from all but the quickest nonflying predators. Flying also gives birds a good view for finding food and mates. | D: flying. |
What property of food is determined by burning the food and measuring the heat released?
Here are the choices:
A. calories
B. acidity
C. additives
D. nutrients | Food calories are determined by burning the food and measuring the heat released. | A: calories. |
What simple machine works with a wheel and axle in a wheelbarrow?
Here are the choices:
A. lever
B. blade
C. pulley
D. hammer | Look at the wheelbarrow in the Figure below . It is used to carry heavy objects. It consists of two simple machines: a lever and a wheel and axle. Effort is applied to the lever by picking up the handles of the wheelbarrow. The lever, in turn, applies upward force to the load. The force is increased by the lever, makin... | A: lever. |
What type of joint has the greatest range of motion?
Here are the choices:
A. Pivot
B. ball-and-socket
C. Gliding
D. Hinge | There are a variety of types of movable joints, which are illustrated in Figure below . The joints are classified by how they move. For example, a ball-and-socket joint, such as the shoulder, has the greatest range of motion, allowing movement in several directions. Other movable joints, including hinge joints such as ... | B: ball-and-socket. |
What is the movement of molecules from an area of high concentration of the molecules to an area with a lower concentration?
Here are the choices:
A. secretion
B. diffusion
C. absorption
D. condensation | Diffusion is the movement of molecules from an area of high concentration of the molecules to an area with a lower concentration. The difference in the concentrations of the molecules in the two areas is called the concentration gradient . Diffusion will continue until this gradient has been eliminated. Since diffusion... | B: diffusion. |
Light-weight air-filled bones and a large four-chambered heart helps a bird do what?
Here are the choices:
A. digest
B. fly
C. run
D. swim | Bird organ systems are adapted for flight. For example, they have light-weight air-filled bones and a large four-chambered heart. | B: fly. |
The myod protein deserves its designation as a master regulatory what?
Here are the choices:
A. protein
B. enzyme
C. gene
D. hormone | Some organisms can reproduce sexually or asexually. Under what conditions might each type of reproduction be an advantage?. | C: gene. |
When flagellated sperm must swim to the egg, sexual reproduction requires the presence of what substance?
Here are the choices:
A. water
B. air
C. nitrogen
D. sunshine | The male gametophyte produces flagellated sperm that must swim to the egg formed by the female gametophyte. For this reason, sexual reproduction must happen in the presence of water. Therefore, nonvascular plants tend to live in moist environments. Though the life of a nonvascular seedless plant is a cycle, this can be... | A: water. |
What consists of these five stages: prophase, prometaphase, metaphase, anaphase, and telophase?
Here are the choices:
A. mitosis
B. meiosis
C. germination
D. evolution | 6.2 The Cell Cycle The cell cycle is an orderly sequence of events. Cells on the path to cell division proceed through a series of precisely timed and carefully regulated stages. In eukaryotes, the cell cycle consists of a long preparatory period, called interphase. Interphase is divided into G1, S, and G2 phases. Mito... | A: mitosis. |
What is the name of the muscle at the end of the esophagus?
Here are the choices:
A. throat
B. intestine
C. sphincter
D. neck | From the pharynx, the food moves into the esophagus. The esophagus is a long, narrow tube that passes food from the pharynx to the stomach by peristalsis. The esophagus has no other digestive functions. At the end of the esophagus, a muscle called a sphincter controls the entrance to the stomach. The sphincter opens to... | C: sphincter. |
What do you call the high and low points of transverse waves?
Here are the choices:
A. waves and troughs
B. crests and troughs
C. bands and troughs
D. echos and troughs | In a transverse wave, such as a wave in a rope, the medium vibrates at right angles to the direction that the wave travels. The high points of transverse waves are called crests, and the low points are called troughs. | B: crests and troughs. |
For each initial glucose molecules, two pyruvate molecules will enter where?
Here are the choices:
A. the plasma
B. the nucleus
C. the mitochondria
D. Golgi apparatus | Aerobic respiration begins with the entry of the product of glycolysis, pyruvate, into the mitochondria. For each initial glucose molecules, two pyruvate molecules will enter the mitochondria. Pyruvate, however, is not the molecule that enters the Krebs cycle. Prior to entry into this cycle, pyruvate must be converted ... | C: the mitochondria. |
Through which artery does blood enter the kidneys?
Here are the choices:
A. jugular
B. renal artery
C. cerebral artery
D. thoracic artery | Blood enters the kidney through the renal artery, which branches into capillaries. When blood passes through capillaries of the glomerulus of a nephron, blood pressure forces some of the water and dissolved substances in the blood to cross the capillary walls into Bowman’s capsule. | B: renal artery. |
Where do radio waves lie on the electromagnetic spectrum?
Here are the choices:
A. far right
B. middle
C. top
D. far left | Courtesy of NASA. Radio waves lie at the far left of the electromagnetic spectrum . Public Domain. | D: far left. |
What links the trophic levels from producers to top carnivores?
Here are the choices:
A. ecosystems
B. environments
C. food chains
D. fuel chains | C: food chains. | |
The waste of cows releases a lot of which type of gas?
Here are the choices:
A. sulphur
B. methane
C. carbon dioxide
D. oxygen | Volatile organic compounds (VOCs) are carbon compounds such as methane. VOCs are released in many human activities, such as raising livestock. Livestock wastes produce a lot of methane. | B: methane. |
What allows giraffes to reach leaves that other ground animals cannot?
Here are the choices:
A. long horns
B. camouflage pattern
C. long tongue
D. long necks | African Giraffes. Giraffes feed on leaves high in trees. Their long necks allow them to reach leaves that other ground animals cannot. | D: long necks. |
Chemical formulas for ionic compounds are called what?
Here are the choices:
A. electronic formulas
B. magnetic formulas
C. ionic formulas
D. velocity formulas | Chemical formulas for ionic compounds are called ionic formulas. A proper ionic formula has a cation and an anion in it; an ionic compound is never formed between two cations only or two anions only. The key to writing proper ionic formulas is simple: the total positive charge must balance the total negative charge. Be... | C: ionic formulas. |
What term is used to describe the full range of electromagnetic waves?
Here are the choices:
A. electromagnetic scale
B. electromagnetic series
C. electromagnetic spectrum
D. mechanical spectrum | Electromagnetic waves vary in their wavelength, frequency, and energy. The full range of electromagnetic waves makes up the electromagnetic spectrum. | C: electromagnetic spectrum. |
How many lobes is each hemisphere of the cerebrum divided into?
Here are the choices:
A. 2
B. 5
C. 4
D. 9 | Each hemisphere of the cerebrum is divided into four parts, called lobes. The four lobes are the:. | C: 4. |
Varicose veins are veins that become enlarged because the valves no longer do this?
Here are the choices:
A. close properly
B. open properly
C. shrink properly
D. enlarge properly | Blood travels through the bicuspid valve to the left atrium. Both the aortic and the pulmonary valves are semilunar valves. The mitral valve is an atrioventricular valve. Figure 40.17 Varicose veins are veins that become enlarged because the valves no longer close properly, allowing blood to flow backward. Varicose vei... | A: close properly. |
Liquids with strong intermolecular forces have higher what than liquids with weaker forces?
Here are the choices:
A. temperature
B. melting point
C. surface tension
D. freezing point | Liquids with strong intermolecular forces have higher surface tensions than liquids with weaker forces. | C: surface tension. |
What kind of volcanoes often form along divergent plate boundaries?
Here are the choices:
A. composite
B. crest
C. shield
D. dome | Shield volcanoes often form along divergent plate boundaries. They also form at hotspots, like Hawaii. Shield volcano eruptions are non-explosive. | C: shield. |
An element symbol without a charge written next to it is assumed to be what?
Here are the choices:
A. corroborate atom
B. uncharged atom
C. dead atom
D. surfactants atom | Third, there are some exceptions to the previous point. A few elements, all metals, can form more than one possible charge. For example, iron atoms can form 2+ cations or 3+ cations. Cobalt is another element that can form more than one possible charged ion (2+ and 3+), while lead can form 2+ or 4+ cations. Unfortunate... | B: uncharged atom. |
What is the fundamental unit of structure and function in all living organisms?
Here are the choices:
A. the vessels
B. the cell
C. the backbone
D. the spinal cord | the cell is the fundamental unit of structure and function in all living organisms,. | B: the cell. |
What characteristic of particles determines how they are carried by flowing water?
Here are the choices:
A. texture
B. color
C. size
D. density | The size of particles determines how they are carried by flowing water. This is illustrated in Figure below . | C: size. |
What term refers to something supplied by nature that helps support life?
Here are the choices:
A. free resource
B. existing resource
C. simple resource
D. natural resource | A natural resource is something supplied by nature that helps support life. When you think of natural resources, you may think of fossil fuels, like the coal in the coal field pictured in Figure below . However, sunlight, wind, soil, and living things are also important natural resources. | D: natural resource. |
What is the shape of the orbits that planets make around the sun?
Here are the choices:
A. elliptical
B. elongated
C. variable
D. conical | The planets make slightly elliptical orbits around the Sun. | A: elliptical. |
What are chlamydia, gonorrhea, and syphilis an example of?
Here are the choices:
A. metabolic disorders
B. bacterial stis
C. viral stis
D. genetic diseases | A sexually transmitted infection (STI) is a disease that spreads mainly through sexual contact. STIs are more common in teens and young adults than in older people. Bacterial STIs include chlamydia, gonorrhea, and syphilis. Viral STIs include genital warts, genital herpes, and AIDS. | B: bacterial stis. |
What organism are resistant to freezing and drying and also are metabolically inactive?
Here are the choices:
A. giardia
B. spirogyra
C. trichina
D. zygosporangia | D: zygosporangia. | |
What is produced during a condensation reaction?
Here are the choices:
A. rain
B. water
C. fire
D. wind | Condensation reactions are the chemical processes by which large organic compounds are synthesized from their monomeric units. Hydrolysis reactions are the reverse process. During condensation reactions, water is produced from the two molecules being bonded together; an H from one monomer is joined to an -OH from anoth... | B: water. |
What force pulls objects toward the center of the earth?
Here are the choices:
A. gravity
B. momentum
C. centrifugal force
D. kinetic energy | A: gravity. | |
Where are protons and neutrons located?
Here are the choices:
A. secondary nucleus
B. central nucleus
C. outside the nucleus
D. orbitals | Protons and neutrons are located in a central nucleus, while electrons orbit about the nucleus. | B: central nucleus. |
What is a measurement of the amount of variation of the species in a given area called?
Here are the choices:
A. population
B. degradation
C. biodiversity
D. ecosystem | Biodiversity is a measurement of the amount of variation of the species in a given area. More specifically, biodiversity can be defined as the variety of life and its processes, including the variety of living organisms, the genetic differences among them, and the communities and ecosystems in which they occur. | C: biodiversity. |
Deleting or inserting a nitrogen base causes what?
Here are the choices:
A. a degenerative mutation
B. a frameshift mutation
C. a photoinhibition mutation
D. a placentation mutation | Deleting or inserting a nitrogen base causes a frameshift mutation. All of the codons following the mutation are misread. This may be disastrous. To see why, consider this English-language analogy. Take the sentence “The big dog ate the red cat. ” If the second letter of “big” is deleted, then the sentence becomes: “Th... | B: a frameshift mutation. |
What are the chemical messengers used to communicate between cells?
Here are the choices:
A. membranes
B. neurons
C. hormones
D. peptides | Hormones, chemical messengers used to communicate between cells, are important in regulating digestion. | C: hormones. |
Graphite and diamond both are made from carbon. what makes diamonds so hard?
Here are the choices:
A. strong atomic network
B. strong light network
C. weak atomic network
D. strong metallic network | Sometimes two different minerals have the same chemical composition. But they are different minerals because they have different crystal structures. Diamonds are beautiful gemstones because they are very pretty and very hard. Graphite is the “lead” in pencils. It's not hard at all! Amazingly, both are made just of carb... | A: strong atomic network. |
The paranasal sinuses are hollow, air-filled spaces located within certain bones of the skull. all of the sinuses communicate with the nasal cavity (paranasal = “next to nasal cavity”) and are lined with this?
Here are the choices:
A. fluid mucosa
B. oral mucosa
C. respiration mucosa
D. nasal mucosa | Paranasal Sinuses The paranasal sinuses are hollow, air-filled spaces located within certain bones of the skull (Figure 7.18). All of the sinuses communicate with the nasal cavity (paranasal = “next to nasal cavity”) and are lined with nasal mucosa. They serve to reduce bone mass and thus lighten the skull, and they al... | D: nasal mucosa. |
What determines the strength of a base when dissolved in water?
Here are the choices:
A. pH level
B. amount of phosphorus ions produced
C. amount of hydroxide ions produced
D. saline content | The strength of a base depends on how many hydroxide ions it produces when it dissolves in water. A stronger base produces more hydroxide ions than a weaker base. For example, sodium hydroxide (NaOH), a base in drain cleaner, is a strong base because all of it breaks down into ions when it dissolves in water. Calcium c... | C: amount of hydroxide ions produced. |
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