questions stringlengths 37 1.22k | reasoning stringlengths 0 3.56k ⌀ | answers stringlengths 4 138 |
|---|---|---|
Chordates include vertebrates and invertebrates that have what?
Here are the choices:
A. a notochord
B. a phloem
C. chordate
D. a endoderm | Chordates include vertebrates and invertebrates that have a notochord. | A: a notochord. |
Nearly how many millions of people die yearly due to air pollution?
Here are the choices:
A. fifty million
B. eight million
C. five million
D. two million | Almost 5 million people die each year because of air pollution. In fact, polluted air causes more deaths than traffic accidents. Air pollution harms the respiratory and circulatory systems. Both outdoor and indoor air can be polluted. | C: five million. |
What instrument is used to record the length and strength of an earthquake?
Here are the choices:
A. transmitter
B. microscope
C. epicenter
D. seismograph | Earthquakes may take place every day near a volcano. But before an eruption the number and size of earthquakes increases. This is the result of magma pushing upward into the magma chamber. This motion causes stresses on neighboring rock to build up. Eventually the ground shakes. A continuous string of earthquakes may i... | D: seismograph. |
Skeletal muscles must work in pairs to move bones back and forth at a joint because they can only do what?
Here are the choices:
A. pull
B. contract
C. expand
D. vibrate | Muscles can only contract. They can’t actively lengthen. Therefore, to move bones back and forth at a joint, skeletal muscles must work in pairs. For example, the bicep and triceps muscles of the upper arm work as a pair. You can see how this pair of muscles works in Figure below . When the bicep muscle contracts, it b... | B: contract. |
What type of molecules are secreted by the cell in local signaling?
Here are the choices:
A. sleeping molecules
B. word molecules
C. messenger molecules
D. negaitive molecules | C: messenger molecules. | |
Pulmonary ventilation in mammals occurs via what?
Here are the choices:
A. ingestion
B. osmosis
C. inhalation
D. inflammation | Mammalian Systems In mammals, pulmonary ventilation occurs via inhalation (breathing). During inhalation, air enters the body through the nasal cavity located just inside the nose (Figure 39.7). As air passes through the nasal cavity, the air is warmed to body temperature and humidified. The respiratory tract is coated... | C: inhalation. |
Chemical signals are received by the target cell on what?
Here are the choices:
A. inceptor proteins
B. acidic proteins
C. parent proteins
D. receptor proteins | The target cell then needs to be able to recognize the signal. Chemical signals are received by the target cell on receptor proteins. Most receptor proteins are found associated with the plasma membrane, but some are also found inside the cell. Receptor proteins are very specific for only one particular signal molecule... | D: receptor proteins. |
What kind of organisms are prokaryotes?
Here are the choices:
A. viral
B. single - flagellated
C. multicellular organisms
D. single-celled | All prokaryotes are single-celled organisms. | D: single-celled. |
What act like filters and remove pathogens from lymph?
Here are the choices:
A. tissue nodes
B. lymph nodes
C. spine nodes
D. electric nodes | Before lymph reaches the bloodstream, it passes through small oval structures called lymph nodes, which are located along the lymph vessels. Figure below shows where some of the body’s many lymph nodes are concentrated. Lymph nodes act like filters and remove pathogens from lymph. | B: lymph nodes. |
What are the primary cells of adaptive immune response?
Here are the choices:
A. white blood cells
B. red blood cells
C. erythrocytes
D. lymphocytes | Lymphocytes: B Cells, T Cells, Plasma Cells, and Natural Killer Cells As stated above, lymphocytes are the primary cells of adaptive immune responses (Table 21.1). The two basic types of lymphocytes, B cells and T cells, are identical morphologically with a large central nucleus surrounded by a thin layer of cytoplasm.... | D: lymphocytes. |
What term refers to the friction of fluid, within itself and its surroundings?
Here are the choices:
A. elasticity
B. volume
C. salinity
D. viscosity | 12.4 Viscosity and Laminar Flow; Poiseuille’s Law Laminar Flow and Viscosity When you pour yourself a glass of juice, the liquid flows freely and quickly. But when you pour syrup on your pancakes, that liquid flows slowly and sticks to the pitcher. The difference is fluid friction, both within the fluid itself and betw... | D: viscosity. |
What do you call a unique substance formed when two or more elements combine chemically?
Here are the choices:
A. compound
B. solution
C. component
D. mixture | Compounds are unique substances that form when two or more elements combine chemically. The smallest particles of compounds are molecules. Some compounds form crystals instead. | A: compound. |
Caves form over time when what causes rocks like limestone to dissolve?
Here are the choices:
A. weather
B. water
C. acid
D. air | It can be really exciting to explore a big underground cave like the one in this picture. Do you know how caves form? Believe it or not, water is the answer. Water slowly dissolves rocks, especially certain types of rocks such as limestone. How does something as mild and harmless as water cause hard rocks to dissolve? ... | B: water. |
Cycloalkanes are hydrocarbons whose molecules are closed rings rather than straight or branched chains. a cyclic hydrocarbon is a hydrocarbon with a ring of these?
Here are the choices:
A. oxygen atoms
B. barium atoms
C. carbon atoms
D. hydrogen atoms | Cycloalkanes are hydrocarbons whose molecules are closed rings rather than straight or branched chains. A cyclic hydrocarbon is a hydrocarbon with a ring of carbon atoms. | C: carbon atoms. |
Speciation, convergent evolution, and coevolution are types of what process?
Here are the choices:
A. microevolution
B. macroevolution
C. devolution
D. systemic evolution | Macroevolution occurs when microevolution takes place over a long period of time. Types of macroevolution include speciation, convergent evolution, and coevolution. | B: macroevolution. |
In what state do ionic compounds best conduct electricity?
Here are the choices:
A. liquid
B. gas
C. plasma
D. solid | Solid ionic compounds are poor conductors of electricity. The strong bonds between ions lock them into place in the crystal. However, in the liquid state, ionic compounds are good conductors of electricity. Most ionic compounds dissolve easily in water. When they dissolve, they separate into individual ions. The ions c... | A: liquid. |
What type of protein fibers in the cytoskeleton are the narrowest?
Here are the choices:
A. macrophages
B. capillaries
C. mitosis
D. microfilaments | Microfilaments Of the three types of protein fibers in the cytoskeleton, microfilaments are the narrowest. They function in cellular movement, have a diameter of about 7 nm, and are made of two intertwined strands of a globular protein called actin (Figure 4.23). For this reason, microfilaments are also known as actin ... | D: microfilaments. |
Which layer of the earth is molten?
Here are the choices:
A. the outer core
B. the inner core
C. the metallic core
D. the mantle | The dense, iron core forms the center of the Earth. Scientists know that the core is metal. The inner core is solid, and the outer core is molten. Here are some of the reasons they know this:. | A: the outer core. |
What is the general name for a solid material that is formed via a natural process?
Here are the choices:
A. mineral
B. gas
C. chemical
D. plasma | A mineral is a solid material that forms by a natural process. A mineral can be made of an element or a compound. It has a specific chemical composition. Its chemical composition is different from other minerals. Each type of mineral has physical properties that differ from others. These properties include crystal stru... | A: mineral. |
In a photosystem, pigments in the light-harvesting complex pass light energy to two special molecules of what in the reaction center?
Here are the choices:
A. calcium
B. chlorophyll
C. nutrient
D. carbonate | Figure 8.15 A photosystem consists of a light-harvesting complex and a reaction center. Pigments in the lightharvesting complex pass light energy to two special chlorophyll a molecules in the reaction center. The light excites an electron from the chlorophyll a pair, which passes to the primary electron acceptor. The e... | B: chlorophyll. |
What branch of science is the study of matter and energy?
Here are the choices:
A. natural science
B. unnatural science
C. negative science
D. physical science | Physical science is the study of matter and energy. That covers a lot of territory because matter refers to all the “stuff” that exists in the universe. It includes everything you can see and many things that you cannot see, including the air around you. Energy is also universal. It’s what gives matter the ability to m... | D: physical science. |
What make us sick when they become human parasites?
Here are the choices:
A. protozoa
B. viruses
C. detritus
D. larvae | Most protist diseases in humans are caused by animal-like protists, or protozoa. Protozoa make us sick when they become human parasites. Three examples of parasitic protozoa are described below. | A: protozoa. |
The tendency of an object to resist a change in its motion is called?
Here are the choices:
A. magnetism
B. gravitation
C. friction
D. inertia | Inertia is the tendency of an object to resist a change in its motion. The inertia of an object depends on its mass. Objects with greater mass have greater inertia. To overcome inertia, an unbalanced force must be applied to an object. | D: inertia. |
Contributing to the blood-brain barrier is one of the jobs of glial cells, which support neurons in what system?
Here are the choices:
A. peripheral nervous system
B. digestive system
C. circulatory system
D. central nervous system | Glial Cells of the CNS One cell providing support to neurons of the CNS is the astrocyte, so named because it appears to be star-shaped under the microscope (astro- = “star”). Astrocytes have many processes extending from their main cell body (not axons or dendrites like neurons, just cell extensions). Those processes ... | D: central nervous system. |
During the condensation reaction of sugars what is removed, linking the two sugars?
Here are the choices:
A. water
B. chlorophyll
C. air
D. hormones | The simple sugars form the foundation of more complex carbohydrates. The cyclic forms of two sugars can be linked together by means of a condensation reaction. The figure below shows how a glucose molecule and a fructose molecule combine to form a sucrose molecule. A hydrogen atom from one molecule and a hydroxyl group... | A: water. |
What develops into embryos inside seeds, from which the next sporophyte generation grows?
Here are the choices:
A. secretions
B. zygotes
C. pupa
D. buds | In seed plants, the gametophyte generation takes place in a cone or flower, which forms on the mature sporophyte plant. Each male gametophyte is just a few cells inside a grain of pollen. Each female gametophyte produces an egg inside an ovule. Pollination must occur for fertilization to take place. Zygotes develop int... | B: zygotes. |
A change in temperature with distance is called a what?
Here are the choices:
A. speed gradient
B. solution gradient
C. temperature gradient
D. oxygen gradient | Air temperature changes with altitude. This does not occur in the same way as pressure and density, which decrease with altitude. Changes in air temperature are not regular. A change in temperature with distance is called a temperature gradient . | C: temperature gradient. |
What sac, which was sitting on top of the flat embryo, envelops the embryo as it folds?
Here are the choices:
A. epithelial sac
B. umbilical sac
C. amniotic sac
D. uterus | The embryo, which begins as a flat sheet of cells, begins to acquire a cylindrical shape through the process of embryonic folding (Figure 28.14). The embryo folds laterally and again at either end, forming a C-shape with distinct head and tail ends. The embryo envelops a portion of the yolk sac, which protrudes with th... | C: amniotic sac. |
Catecholamines are a class of amine hormones synthesised form which amino acid?
Here are the choices:
A. dopamine
B. epinephrine
C. tyrosine
D. phenylalanine | C: tyrosine. | |
Regulation of hormone production hormone levels are primarily controlled through negative feedback, in which rising levels of a hormone inhibit its?
Here are the choices:
A. recent release
B. further release
C. Limited release
D. particular release | 37.4 Regulation of Hormone Production Hormone levels are primarily controlled through negative feedback, in which rising levels of a hormone inhibit its further release. The three mechanisms of hormonal release are humoral stimuli, hormonal stimuli, and neural stimuli. Humoral stimuli refers to the control of hormonal ... | B: further release. |
Androgen secretion and sperm production are both controlled by hypothalamic and which other hormones?
Here are the choices:
A. Testes
B. adrenal
C. salivary
D. pituitary | D: pituitary. | |
The sum of the superscripts in an electron configuration is equal to the number of electrons in that atom, which is in turn equal to what number?
Here are the choices:
A. atomic number
B. metallic number
C. orbital number
D. shell number | Electron configuration notation eliminates the boxes and arrows of orbital filling diagrams. Each occupied sublevel designation is written followed by a superscript that is the number of electrons in that sublevel. For example, the hydrogen configuration is 1 s 1 , while the helium configuration is 1 s 2 . Multiple occ... | A: atomic number. |
What part of the brain controls body position, coordination, and balance?
Here are the choices:
A. right brain
B. cerebellum
C. brain stem
D. cerebrum | The cerebellum is the next largest part of the brain. It controls body position, coordination, and balance. Hakeem’s cerebellum kicked in when he started to lose his balance on the railing in the opening photo. It allowed him to regain his balance. | B: cerebellum. |
When light transfers its energy to objects, this is known as what?
Here are the choices:
A. absorption
B. accumulation
C. condensation
D. evaporation | Light may transfer its energy to matter rather than being reflected or transmitted by matter. This is called absorption . When light is absorbed, the added energy increases the temperature of matter. If you get into a car that has been sitting in the sun all day, the seats and other parts of the car’s interior may be a... | A: absorption. |
What do most amphibians breathe with as larvae?
Here are the choices:
A. gills
B. nasal passages
C. lungs
D. pores | Most amphibians breathe with gills as larvae and with lungs as adults. Additional oxygen is absorbed through the skin in most species. The skin is kept moist by mucus, which is secreted by mucous glands. In some species, mucous glands also produce toxins, which help protect the amphibians from predators. The golden fro... | A: gills. |
The chemical used by the ants to weed their garden turns out to be what kind?
Here are the choices:
A. nitric acid
B. sulfide acid
C. formic acid
D. sealant acid | C: formic acid. | |
A common age-related bone disease in which bone density and strength is decreased is know as what?
Here are the choices:
A. osteoporosis
B. allergies
C. Stomach
D. fibrosis | Osteoporosis is a common age-related bone disease in which bone density and strength is decreased. Watch this video (http://openstaxcollege. org/l/osteoporosis) to get a better understanding of how thoracic vertebrae may become weakened and may fracture due to this disease. How may vertebral osteoporosis contribute to ... | A: osteoporosis. |
Some fruit, like peaches, only have one big seed. what is this seed called?
Here are the choices:
A. the seed
B. the middle
C. the pit
D. the core | C: the pit. | |
Dragonflies were one of the first insects to do what?
Here are the choices:
A. sexually reproduce
B. fly
C. fight
D. swim | B: fly. | |
Intestinal cells combine with proteins to create what?
Here are the choices:
A. chondrocytes
B. lipoproteins
C. amino acids
D. chylomicrons | Diffusion into intestinal cells, where they are combined with proteins to create chylomicrons. | D: chylomicrons. |
Dutch elm trees used to be common, beautiful trees in the united states. now most of them have been killed by what?
Here are the choices:
A. carbon dioxide
B. dutch elm disease
C. cancer
D. beetles | Dutch elm trees used to be common, beautiful trees in the United States. Now most of them, like this tree, have been killed by Dutch elm disease. Dutch elm disease is caused by a fungus. This is just one example of how fungi can interact with other species. | B: dutch elm disease. |
Two major types of fungus-like protists are slime molds and which other?
Here are the choices:
A. black molds
B. water molds
C. green molds
D. foul molds | Fungus-like protists share many features with fungi. Like fungi, they are heterotrophs, meaning they must obtain food outside themselves. They also have cell walls and reproduce by forming spores, just like fungi. Fungus-like protists usually do not move, but a few develop movement at some point in their lives. Two maj... | B: water molds. |
What are broken down during digestion to provide the amino acids needed for protein synthesis?
Here are the choices:
A. carbohydrates
B. dietary proteins
C. metabolytes
D. sugars | Dietary proteins are broken down during digestion to provide the amino acids needed for protein synthesis. Any extra proteins in the diet not needed for this purpose are used for energy or stored as fat. One gram of proteins provides 4 Calories of energy. Eating protein provides the amino acids for your cells to produc... | B: dietary proteins. |
A group of atoms that results when one hydrogen atom is removed from an alkane is referred to as what?
Here are the choices:
A. alkyl group
B. nitrate group
C. hyrdrogen group
D. chloride group | An alkyl group is a group of atoms that results when one hydrogen atom is removed from an alkane. The group is named by replacing the -ane suffix of the parent hydrocarbon with -yl. For example, the CH3 group derived from methane (CH4) results from subtracting one hydrogen atom and is called a methyl group. The alkyl g... | A: alkyl group. |
What is the term for stored energy that an object has due to its position or shape?
Here are the choices:
A. kinetic energy
B. mechanical energy
C. potential energy
D. vertical energy | A: Electric charges flow when they have electric potential energy. Potential energy is stored energy that an object has due to its position or shape. | C: potential energy. |
What force is greater on rougher surfaces than smooth surfaces?
Here are the choices:
A. gravity
B. acceleration
C. friction
D. tension | Rougher surfaces have more friction between them than smoother surfaces. That’s why we put sand on icy sidewalks and roads. The blades of skates are much smoother than the soles of shoes. That’s why you can’t slide as far across ice with shoes as you can with skates (see Figure below ). The rougher surface of shoes cau... | C: friction. |
Nitrogen is a very important element to living things, because it is part of nucleotides and amino acids that are the building blocks of nucleic acids and these?
Here are the choices:
A. follicles
B. cells
C. proteins
D. lipids | Cooperation between Bacteria and Eukaryotes: Nitrogen Fixation Nitrogen is a very important element to living things, because it is part of nucleotides and amino acids that are the building blocks of nucleic acids and proteins, respectively. Nitrogen is usually the most limiting element in terrestrial ecosystems, with ... | C: proteins. |
In the mouth, enzymes present in what begin to chemically break down food?
Here are the choices:
A. saliva
B. blood
C. acid
D. lymph | The Human Digestive System The process of digestion begins in the mouth with the intake of food (Figure 16.4). The teeth play an important role in masticating (chewing) or physically breaking food into smaller particles. The enzymes present in saliva also begin to chemically break down food. The food is then swallowed ... | A: saliva. |
Unlike the cells of plants and fungi, animal cells lack what?
Here are the choices:
A. flagella
B. nuclei
C. mitochondria
D. cell wall | Like the cells of all eukaryotes, animal cells have a nucleus and other membrane-bound organelles (see Figure below ). Unlike the cells of plants and fungi, animal cells lack a cell wall. This gives animal cells flexibility. It lets them take on different shapes so they can become specialized to do particular jobs. The... | D: cell wall. |
Because alkali metals are so reactive, they are found in nature only in ________ with other elements?
Here are the choices:
A. competition
B. combination
C. cooperation
D. isolation | Hydrogen is a very reactive gas, and the alkali metals are even more reactive. In fact, they are the most reactive metals and, along with the elements in group 17, are the most reactive of all elements. The reactivity of alkali metals increases from the top to the bottom of the group, so lithium (Li) is the least react... | B: combination. |
What is the plane that divides the body or an organ vertically into right and left sides?
Here are the choices:
A. median plane
B. anatomical plane
C. sagittal plane
D. parasagittal plane | • The sagittal plane is the plane that divides the body or an organ vertically into right and left sides. If this vertical plane runs directly down the middle of the body, it is called the midsagittal or median plane. If it divides the body into unequal right and left sides, it is called a parasagittal plane or less co... | C: sagittal plane. |
What are the organs work together to allow us to see?
Here are the choices:
A. brain and eyes
B. lungs
C. heart
D. nose | The ability to see is called vision. The brain and eyes work together to allow us to see. The eyes collect and focus visible light and change it to electrical signals that travel to the brain. The brain interprets the signals and “tells” us what we are seeing. | A: brain and eyes. |
The brain develops from this early tube structure and gives rise to specific regions of the adult brain. as the neural tube grows and differentiates, it enlarges into three vesicles that correspond to the forebrain, midbrain, and this?
Here are the choices:
A. hindbrain
B. astrobrain
C. rearbrain
D. anteriorbrain | into the brain, and the posterior region becomes the spinal cord. Tissues at the edges of the neural groove, when it closes off, are called the neural crest and migrate through the embryo to give rise to PNS structures as well as some non-nervous tissues. The brain develops from this early tube structure and gives rise... | A: hindbrain. |
Biotechnology uses what to solve problems?
Here are the choices:
A. geology
B. ecology
C. biology
D. psycology | Biotechnology is technology based on biological applications. These applications are increasingly used in medicine, agriculture and food science. Biotechnology combines many features of biology, including genetics, molecular biology, biochemistry, embryology, and cell biology. Many aspects of biotechnology center aroun... | C: biology. |
What are hurricanes called in the pacific?
Here are the choices:
A. twisters
B. rainstorms
C. typhoons
D. tornados | Tornadoes may also come from hurricanes. A hurricane ( Figure below ) is an enormous storm with high winds and heavy rains. Hurricanes may be hundreds of kilometers wide. They may travel for thousands of kilometers. The storm's wind speeds may be greater than 251 kilometers (156 miles) per hour. Hurricanes develop from... | C: typhoons. |
What is the organ in which gas exchanges take place between blood and air?
Here are the choices:
A. skin
B. lungs
C. kidney
D. heart | Respiration begins with ventilation. This is the process of moving air in and out of the lungs. The lungs are the organs in which gas exchange takes place between blood and air. | B: lungs. |
What branch of science deals with the effects people have on the environment?
Here are the choices:
A. physical science
B. ecological science
C. cultural science
D. environmental science | Environmental science deals with the effects people have on the environment. | D: environmental science. |
Sickle cell anemia is what type of disorder?
Here are the choices:
A. spontaneous mutation
B. autosomal dominant disorder
C. nongenetic disorder
D. autosomal recessive disorder | Sickle-Shaped and Normal Red Blood Cells. Sickle cell anemia is an autosomal recessive disorder. The mutation that causes the disorder affects just one amino acid in a single protein, but it has serious consequences for the affected person. This photo shows the sickle shape of red blood cells in people with sickle cell... | D: autosomal recessive disorder. |
Which region is just posterior to the mouth?
Here are the choices:
A. the diaphragm
B. the esophagus
C. the pharynx
D. the duodenum | C: the pharynx. | |
What is the collective travel of sheep known as?
Here are the choices:
A. load
B. den
C. gaggle
D. herd | Like many other animals, sheep travel in herds. The tendency is for each individual sheep to stay with the herd. However, a sheep may sometimes wander off, depending on how strong the attraction is for a particular food or water supply. At other times, a sheep may become frightened and run off. Whether a sheep chooses ... | D: herd. |
What are these examples of: a person riding a carousel and a skydiver in free fall?
Here are the choices:
A. centripetal force
B. vibration
C. acceleration
D. centrifugal force | Examples of acceleration include a person riding a carousel and a skydiver in free fall. | C: acceleration. |
Elements below the second period, such as silicon, do not form what as readily as second-period elements, and when they do form, they are weaker than those formed by second-period elements?
Here are the choices:
A. covalent bonds
B. magnetic bonds
C. k. bonds
D. n bonds | Silicon dioxide, silica, occurs in both crystalline and amorphous forms. The usual crystalline form of silicon dioxide is quartz, a hard, brittle, clear, colorless solid. It is useful in many ways—for architectural decorations, semiprecious jewels, and frequency control in radio transmitters. Silica takes many crystall... | D: n bonds. |
Through what method or methods of fertilization do amphibians sexually reproduce?
Here are the choices:
A. external or internal
B. mitosis and meiosis
C. spawning or budding
D. asexual or sexual | Amphibians reproduce sexually with either external or internal fertilization. They may attract mates with calls or scents. They do not produce amniotic eggs, so they must reproduce in water. Their larvae go through metamorphosis to change into the adult form. | A: external or internal. |
The distance between corresponding points of adjacent waves is known as the __________
Here are the choices:
A. wavelength
B. absorption
C. amplitude
D. bandwidth | Wavelength is the distance between corresponding points of adjacent waves. Wavelengths of electromagnetic waves range from many kilometers to a tiny fraction of a millimeter. | A: wavelength. |
Which system consists of all the nervous tissue that lies outside the central nervous system?
Here are the choices:
A. peripheral nervous system
B. cerebral cortex
C. auxiliary nervous system
D. spinal cord | The peripheral nervous system consists of all the nervous tissue that lies outside the central nervous system. It is connected to the central nervous system by nerves. It has several divisions and subdivisions that transmit nerve impulses between the central nervous system and the rest of the body. | A: peripheral nervous system. |
What mechanism is used by living organisms to pass along genes?
Here are the choices:
A. digestion
B. protein
C. chlorophyll
D. dna | 16 Gregor Mendel and biological inheritance Charles Darwin1 , for all he contributed to the science of biology, never knew about the mechanism by which living things inherit traits from previous generations, or how new traits arise. As any schoolchild can tell you, this mechanism of interitance has since been found to ... | D: dna. |
The third line of defense of the immune system is called?
Here are the choices:
A. the sudden response
B. the asymptomatic response
C. the immune response
D. the malignant response | Like the immune systems of other vertebrates, the human immune system is adaptive. If pathogens manage to get through the body’s first two lines of defense, the third line of defense takes over. The third line of defense is referred to as the immune response . This defense is specific to a particular pathogen, and it a... | C: the immune response. |
What's it called when gases turn back into liquids?
Here are the choices:
A. evaporation
B. dehydration
C. condensation
D. diffusion | As water cools in the clouds, condensation occurs. Condensation is when gases turn back into liquids. | C: condensation. |
What is a molecule made up of two subunits?
Here are the choices:
A. acid
B. chloride
C. enzyme
D. dimer | D: dimer. | |
The pulmonary artery carries deoxygenated blood into the lungs from this?
Here are the choices:
A. legs
B. heart
C. brain
D. bladder | External Respiration The pulmonary artery carries deoxygenated blood into the lungs from the heart, where it branches and eventually becomes the capillary network composed of pulmonary capillaries. These pulmonary capillaries create the respiratory membrane with the alveoli (Figure 22.22). As the blood is pumped throug... | B: heart. |
All of the living things in an area and the nonliving environment together make up what?
Here are the choices:
A. biosphere
B. biome
C. taiga
D. ecosystem | An ecosystem consists of all the living things in a given area, together with the nonliving environment. The nonliving environment includes water, sunlight, and other physical factors. | D: ecosystem. |
What areas of the planet are most birds native to?
Here are the choices:
A. tundra
B. desert
C. mountainous
D. tropical | Birds live and breed in most terrestrial habitats on Earth. They can be found on all seven continents, from the Arctic to Antarctica. However, the majority of bird species are native to tropical areas of the planet. | D: tropical. |
What is the basis of enzyme classification?
Here are the choices:
A. their color
B. reactions they catalyze
C. their shape
D. their mass | Enzymes are classified by the types of reactions that they catalyze. | B: reactions they catalyze. |
Scientists use the principles of what to make predictions, which they then test?
Here are the choices:
A. their teachers
B. their guesses
C. their faith
D. their hypothesis | The experiment is a cornerstone in the scientific approach to gaining deeper knowledge about the natural world. Scientists use the principles of their hypothesis to make predictions, and then test them to see if their predictions are to be confirmed or rejected. | D: their hypothesis. |
How many membranes form the mitochondrion structure of a cell?
Here are the choices:
A. three
B. two
C. five
D. one | Two separate membranes form the mitochondrion. The inner membrane folds into cristae which divide the organelle into three compartments: the intermembrane space (between outer and inner membranes), cristae space (formed by infoldings of the inner membrane), and the matrix (within the inner membrane). The Krebs Cycle ta... | B: two. |
Lava that enters the water is called what?
Here are the choices:
A. saltwater lava
B. magma runoff
C. lava flow
D. pillow lava | Pillow lava is created from lava that enters the water. The volcanic vent may be underwater. The lava may flow over land and enter the water ( Figure below ). Once in the water, the lava cools very quickly. The lava forms round rocks that resemble pillows. Pillow lava is particularly common along mid-ocean ridges. | D: pillow lava. |
What do we call plants that shed their leaves seasonally each year?
Here are the choices:
A. perennials
B. deciduous plants
C. annuals
D. lush plants | After leaves turn color in the fall, they may all fall off the plant for the winter. Plants that shed their leaves seasonally each year are called deciduous plants . Shedding leaves is a strategy for reducing water loss during seasons of extreme dryness. On the downside, the plant must grow new leaves in the spring, an... | B: deciduous plants. |
What do some animals use to get a feel for their environment?
Here are the choices:
A. mechanoreceptors
B. fibroblasts
C. neuroreceptors
D. nociceptors | A: mechanoreceptors. | |
Gas particles are constantly colliding with each other and the walls of a container, and these collisions are elastic, so there is no net loss of what?
Here are the choices:
A. velocity
B. energy
C. temperature
D. heat | A N SW E R S 1. Gases consist of tiny particles of matter that are in constant motion. Gas particles are constantly colliding with each other and the walls of a container. These collisions are elastic; that is, there is no net loss of energy from the collisions. Gas particles are separated by large distances, with the ... | B: energy. |
How do birds learn to avoid eating monarch butterflies?
Here are the choices:
A. digestion
B. conditioning
C. temperature
D. instinct | Birds learn through conditioning to avoid eating monarch butterflies. | B: conditioning. |
What part of the sperm contains the genetic material?
Here are the choices:
A. the "head"
B. the " tail "
C. the " body "
D. the " brain " | A human sperm is a tiny cell with a tail. A human egg is much larger. Both cells are mature haploid gametes that are capable of fertilization. What process is shown in this photograph? Notice the sperm with the head piece containing the genetic material, a flagella tail that propels the sperm, and a midpiece of mostly ... | A: the "head". |
Multiple sclerosis, huntington’s disease, and parkinson’s disease all affect what body system?
Here are the choices:
A. circulatory system
B. reproductive system
C. lymph system
D. nervous system | In addition to ALS and Alzheimer's disease, other serious nervous system diseases include multiple sclerosis, Huntington’s disease, and Parkinson’s disease. T hese diseases rarely, if ever, occur in young people. Their causes and symptoms are listed below ( Table below ). The diseases have no known cure, but medicines ... | D: nervous system. |
The force that blood exerts upon the walls of the blood vessels or upon the chambers of the heart is known as blood what?
Here are the choices:
A. pressure
B. vaccuum
C. squeeze
D. push | 20.2 Blood Flow, Blood Pressure, and Resistance Blood flow is the movement of blood through a vessel, tissue, or organ. The slowing or blocking of blood flow is called resistance. Blood pressure is the force that blood exerts upon the walls of the blood vessels or chambers of the heart. The components of blood pressure... | A: pressure. |
What is the term for the amount of internal energy that the substance can store?
Here are the choices:
A. humidity capacity
B. heat capacity
C. temperature capacity
D. mass capacity | Heat capacity is the amount of internal energy that the substance can store. A large heat capacitance means the substance can store a lot of internal energy and thus the temperature changes slowly. Aluminum foil has a small heat capacitance and water has a large one. | B: heat capacity. |
An aquifer is an underground layer of rock that is saturated with what?
Here are the choices:
A. oil
B. ocean water
C. wastewater
D. groundwater | An aquifer is an underground layer of rock that is saturated with groundwater. One of the biggest aquifers in the world is the Ogallala aquifer in the American Midwest. | D: groundwater. |
Oysters require a certain minimum population density because they must be in close proximity to do this?
Here are the choices:
A. replicate
B. reproduce
C. multiply
D. feed | The Chesapeake Bay (Figure 20.15a) is one of the most scenic areas on Earth; it is now in distress and is recognized as a case study of a declining ecosystem. In the 1970s, the Chesapeake Bay was one of the first aquatic ecosystems to have identified dead zones, which continue to kill many fish and bottomdwelling speci... | B: reproduce. |
Rubber is an example of what type of substances that do not allow electrons to move through them?
Here are the choices:
A. semi-conductor
B. solids
C. insulators
D. conductor | A common method of producing charge in the lab is to rub cat or rabbit fur against stiff rubber, producing a negative charge on the rubber rod. If you hold a rubber rod on one end and rub only the tip of the other end with a fur, you will find that only the tip becomes charged. The electrons you add to the tip of the r... | C: insulators. |
What gland is located in the neck, where it wraps around the trachea?
Here are the choices:
A. thyroid gland
B. adrenal gland
C. salivary gland
D. pituitary gland | Figure 17.12 Thyroid Gland The thyroid gland is located in the neck where it wraps around the trachea. (a) Anterior view of the thyroid gland. (b) Posterior view of the thyroid gland. (c) The glandular tissue is composed primarily of thyroid follicles. The larger parafollicular cells often appear within the matrix of f... | A: thyroid gland. |
What is influences the inhibition of axillary buds by an apical bud?
Here are the choices:
A. apical dominance
B. eliptical dominance
C. anterior dominance
D. cortical dominance | A: apical dominance. | |
The colorless, odorless gas released when we breath is carbon dioxide. the harmful colorless, odorless gas released when matter is burned is what?
Here are the choices:
A. carbon trioxide
B. acid monoxide
C. carbon monoxide
D. methane | Carbon Dioxide: Every time you exhale, you release carbon dioxide into the air. It's an odorless, colorless gas. Carbon dioxide contributes to global climate change, but it isn't directly harmful to human health. Carbon Monoxide: Carbon monoxide is produced when matter burns. It's a colorless, odorless gas that is very... | C: carbon monoxide. |
How are bacteria cells similar to our cells?
Here are the choices:
A. plasma and number of protons
B. dna and number of protons
C. shape and size
D. dna & plasma membrane | Yes and no. Bacteria cells are similar to our cells in some ways. Like our cells, bacteria cells have DNA and a plasma membrane. But bacteria are unique in other ways. They are called prokaryotic cells because of these differences. | D: dna & plasma membrane. |
What kind of health problem can occur in the kidney and potentially cause problems with urination?
Here are the choices:
A. kidney stones
B. gallstones
C. diabetes
D. infection | Kidney stones are mineral crystals that form in urine inside the kidney. They may be extremely painful. If they block a ureter, they must be removed so urine can leave the kidney and be excreted. | A: kidney stones. |
What can alkenes and alkynes be reduced with to form alkanes?
Here are the choices:
A. enzymes
B. hydrogen gas
C. oxygen
D. acids | Alkenes and alkynes can be reduced with hydrogen gas to form alkanes. | B: hydrogen gas. |
The vapor pressures of various liquids depends primarily on the strength of what kind of attractions between individual particles?
Here are the choices:
A. diffusion
B. outer molecular
C. gravitational
D. intermolecular | As we saw when we studied States of Matter , the driving force for particles in the liquid phase to escape into the gas phase depends on both the temperature and identity of the substance. The vapor pressure of a liquid is a measure of this ability. Specifically, vapor pressure is the pressure exerted by a vapor that i... | D: intermolecular. |
What is the term for a structure within the cytoplasm that performs a specific job in the cell?
Here are the choices:
A. nucleus
B. mitochondria
C. ribosome
D. organelle | Eukaryotic cells also contain other organelles besides the nucleus. An organelle is a structure within the cytoplasm that performs a specific job in the cell. Organelles called mitochondria, for example, provide energy to the cell, and organelles called vacuoles store substances in the cell. Organelles allow eukaryotic... | D: organelle. |
The two members of a given pair of chromosomes are called what?
Here are the choices:
A. homologous chromosomes
B. divergant chromosomes
C. tissue chromosomes
D. isolated chromosomes | The two members of a given pair of chromosomes are called homologous chromosomes . We get one of each homologous pair, or 23 chromosomes, from our father. We get the other one of each pair, or 23 chromosomes, from our mother. A gamete must have the haploid number of chromosomes. That way, when two gametes unite, the zy... | A: homologous chromosomes. |
What type of organism is used to produce alcoholic beverages and bread?
Here are the choices:
A. bacteria
B. yeast
C. larvae
D. insects | B: yeast. | |
On top of the otolithic membrane is a layer of calcium carbonate crystals, called what?
Here are the choices:
A. calcites
B. gonads
C. cones
D. otoliths | Equilibrium (Balance) Along with audition, the inner ear is responsible for encoding information about equilibrium, the sense of balance. A similar mechanoreceptor—a hair cell with stereocilia—senses head position, head movement, and whether our bodies are in motion. These cells are located within the vestibule of the ... | D: otoliths. |
What do we call the locations where electrons are likely to be located around the nucleus?
Here are the choices:
A. isotopes
B. orbitals
C. cores
D. radials | The locations where electrons are likely to be located around the nucleus are known as orbitals. Each orbital represents a three-dimensional region in which a given electron is most likely to be found. | B: orbitals. |
What makes up the central nervous system?
Here are the choices:
A. brain and heart
B. spine and lungs
C. heart and lungs
D. brain and spinal cord | The central nervous system is made up of the brain and the spinal cord. | D: brain and spinal cord. |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.