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test · 389k rows

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What is the scale on which acidity is measured? Here are the choices: A. hp B. μm C. ph D. μg	The concentration of hydronium ions in a solution is known as acidity. In pure water, the concentration of hydronium ions is very low; only about 1 in 10 million water molecules naturally breaks down to form a hydronium ion. As a result, pure water is essentially neutral. Acidity is measured on a scale called pH , as s...	C: ph.
Almost all fungi reproduce asexually by producing what? Here are the choices: A. atoms B. ions C. spores D. roots	Almost all fungi reproduce asexually by producing spores. A fungal spore is a haploid cell produced by mitosis from a haploid parent cell. It is genetically identical to the parent cell. Fungal spores can develop into new haploid individuals without being fertilized.	C: spores.
Thomson’s plum pudding model shows the structure of what? Here are the choices: A. DNA B. nucleus C. atom D. cell	Following the discovery of the electron, J. J. Thomson developed what became known as the “ plum pudding ” model in 1904. Plum pudding is an English dessert similar to a blueberry muffin. In Thomson’s plum pudding model of the atom, the electrons were embedded in a uniform sphere of positive charge like blueberries stu...	C: atom.
What type of carbons may be gases, liquids, or solids at room temperature? Here are the choices: A. amorphous B. graphites C. diamonds D. hydrocarbons	Hydrocarbons vary greatly in size, which influences properties such as melting and boiling points. At room temperature, hydrocarbons may be gases, liquids, or solids. They are generally nonpolar and do not dissolve in water.	D: hydrocarbons.
What diagnostic technology uses high-frequency vibrations transmitted into any tissue in contact with the transducer? Here are the choices: A. radiation B. ultrasound C. sonar D. laser	Ultrasound in Medical Diagnostics When used for imaging, ultrasonic waves are emitted from a transducer, a crystal exhibiting the piezoelectric effect (the expansion and contraction of a substance when a voltage is applied across it, causing a vibration of the crystal). These highfrequency vibrations are transmitted in...	B: ultrasound.
At what time of life does menopause occur? Here are the choices: A. adolescence B. old age C. in middle adulthood D. young adulthood	The menstrual cycle includes events that take place in the ovary, such as ovulation. It also includes changes in the uterus, including menstruation. Menopause occurs when menstruation stops occurring, usually in middle adulthood.	C: in middle adulthood.
What type of current carries warm air from surrounding rocks to an animal's body? Here are the choices: A. convection B. radiation C. electric D. ventilation	Heat Transfer to an Ectothermic Reptile. This crocodile is being warmed by the environment in three ways. Heat is radiating directly from the sun to the animal’s back. Heat is also being conducted to the animal from the rocks it rests on. In addition, convection currents are carrying warm air from surrounding rocks to ...	A: convection.
What quality of sound makes a tuba and a piccolo very different to a listener? Here are the choices: A. pitch B. tune C. wavelength D. curve	A piccolo and a tuba sound very different. One difference is the pitch of their sounds.	A: pitch.
Where is the food supply and embryo stored in a seed? Here are the choices: A. tegmen B. plumule C. hull D. epicotyl	reproductive structure produced by a seed plant that contains an embryo and food supply enclosed within a hull.	C: hull.
Most arthropods are insects. the phylum also includes spiders, centipedes, and what? Here are the choices: A. amphibians B. coral C. crustaceans D. crystals	Most arthropods are insects. The phylum also includes spiders, centipedes, and crustaceans.	C: crustaceans.
A cartilaginous joint where the bones are joined by fibrocartilage is called a what? Here are the choices: A. Testes B. mitosis C. symphysis D. vesicles	Symphysis A cartilaginous joint where the bones are joined by fibrocartilage is called a symphysis (“growing together”). Fibrocartilage is very strong because it contains numerous bundles of thick collagen fibers, thus giving it a much greater ability to resist pulling and bending forces when compared with hyaline cart...	C: symphysis.
The horizontal stems on strawberry plants are called what? Here are the choices: A. buds B. glands C. stolons D. nodules	User:DrU/Wikipedia. Strawberry plants have horizontal stems called stolons that can form new plants. . Public Domain.	C: stolons.
What are the newest, outer layers of secondary xylem called? Here are the choices: A. bark B. vascular C. sapwood D. fibrous		C: sapwood.
Most amphibians breathe with these as larvae? Here are the choices: A. pores B. lungs C. gills D. nostrils	Amphibian skin contains keratin, a protein that is also found in the outer covering of most other four-legged vertebrates. The keratin in amphibians is not too tough to allow gases and water to pass through their skin. Most amphibians breathe with gills as larvae and with lungs as adults. However, extra oxygen is absor...	C: gills.
Defined as a substance in foods and beverages that is essential to human survival, what term encompasses water, energy-yielding and body-building substances, and vitamins and minerals? Here are the choices: A. sustenance B. molecules C. nutrients D. calories	Nutrients A nutrient is a substance in foods and beverages that is essential to human survival. The three basic classes of nutrients are water, the energy-yielding and body-building nutrients, and the micronutrients (vitamins and minerals). The most critical nutrient is water. Depending on the environmental temperature...	C: nutrients.
Genetic disorders are diseases caused by what? Here are the choices: A. mutations B. environment C. traits D. lesions	Sequencing the human genome has increased our knowledge of genetic disorders. Genetic disorders are diseases caused by mutations. Many genetic disorders are caused by mutations in a single gene. Others are caused by abnormal numbers of chromosomes.	A: mutations.
Transgenic animals are animals that have incorporated a gene from another species into their what? Here are the choices: A. food B. enemies C. genome D. habitats	DNA technology has proved very beneficial to humans. Transgenic animals are animals that have incorporated a gene from another species into their genome. They are used as experimental models to perform phenotypic tests with genes whose function is unknown, or to generate animals that are susceptible to certain compound...	C: genome.
What structure of a cell is enclosed by a membrane and contains most of the cell’s dna? Here are the choices: A. nucleus B. ribosome C. vacuole D. epidermis	Besides the four parts listed above, many cells also have a nucleus. The nucleus of a cell is a structure enclosed by a membrane that contains most of the cell’s DNA. Cells are classified in two major groups based on whether or not they have a nucleus. The two groups are prokaryotic cells and eukaryotic cells.	A: nucleus.
Does air temperature increase or decrease as it rises higher in the atmosphere? Here are the choices: A. increase B. decrease C. neither D. both	The rising air cools as it goes higher in the atmosphere. If it is moist, the water vapor may condense. Clouds may form, and precipitation may fall.	B: decrease.
During what do homologous chromosomes separate and go to different daughter cells? Here are the choices: A. electrolysis B. mitosis C. meiosis D. birth	Overview of Meiosis. During meiosis, homologous chromosomes separate and go to different daughter cells. This diagram shows just the nuclei of the cells. Notice the exchange of genetic material that occurs prior to the first cell division.	C: meiosis.
The light reactions take place in which membranes? Here are the choices: A. the thylakoid B. the phospholipid C. the cell membranes D. the stroma	Both stages of photosynthesis take place in chloroplasts. The light reactions take place in the thylakoid membranes, and the Calvin cycle takes place in the stroma.	A: the thylakoid.
Fossils themselves and the order in which they appear in are generally collectively called what? Here are the choices: A. fossil magnitude B. coal record C. fossil record D. fuel cycle	There are many layers of rock in the Earth's surface. Newer layers form on top of the older layers; the deepest rock layers are the oldest. Therefore, you can tell how old a fossil is by observing in which layer of rock it was found. The fossils and the order in which fossils appear is called the fossil record . The fo...	C: fossil record.
Hormones send what through your body? Here are the choices: A. proteins B. signals C. nutrients D. cells	Good record keeping is very important in scientific research.	B: signals.
What does the armor including spines in some species offer? Here are the choices: A. energy B. nutrition C. protection from cold D. protection from predators		D: protection from predators.
Individual nucleotides can be linked together through their phosphate groups to form? Here are the choices: A. dna B. atoms C. nucleic acid polymers D. nitrous acid polymers	Individual nucleotides can be linked together through their phosphate groups to form nucleic acid polymers. Once constructed, DNA generally exists as two strands that are linked together by hydrogen bonds, producing a double-helical structure (see Figure below ).	C: nucleic acid polymers.
The name silicon is derived from the latin word for flint? Here are the choices: A. silk B. pelea C. simple D. silex	The name silicon is derived from the Latin word for flint, silex. The metalloid silicon readily forms compounds containing Si-O-Si bonds, which are of prime importance in the mineral world. This bonding capability is in contrast to the nonmetal carbon, whose ability to form carbon-carbon bonds gives it prime importance...	D: silex.
What two types of juices help digestion within the small intestine? Here are the choices: A. amniotic fluid, bile B. bile and lymph C. chyme and phloem D. intestinal and pancreatic	Chemical Digestion in the Small Intestine The digestion of proteins and carbohydrates, which partially occurs in the stomach, is completed in the small intestine with the aid of intestinal and pancreatic juices. Lipids arrive in the intestine largely undigested, so much of the focus here is on lipid digestion, which is...	D: intestinal and pancreatic.
Cells in a biofilm secrete what to recruit nearby cells? Here are the choices: A. signaling molecules B. signaling proteins C. signaling neurons D. harnessing molecules		A: signaling molecules.
A standing wave is created when what type of wave interferes with the original wave? Here are the choices: A. refracted wave B. realized wave C. reflected wave D. translated wave	When a wave meets a barrier, it reflects and travels back the way it came. The reflected wave may interfere with the original wave. If this occurs in precisely the right way, a standing wave can be created. The types of standing waves that can form depend strongly on the speed of the wave and the size of the region in ...	C: reflected wave.
The kidneys are a pair of bean-shaped structures that are located just below and posterior to the liver in this? Here are the choices: A. stomach cavity B. peritoneal cavity C. mantle cavity D. cerebral cavity	Kidneys: The Main Osmoregulatory Organ The kidneys, illustrated in Figure 41.4, are a pair of bean-shaped structures that are located just below and posterior to the liver in the peritoneal cavity. The adrenal glands sit on top of each kidney and are also called the suprarenal glands. Kidneys filter blood and purify it...	B: peritoneal cavity.
What term means anything that is detected either through human senses or with instruments and measuring devices that extend human senses? Here are the choices: A. variation B. observation C. evaluation D. evacuation	Science rests on evidence and logic, so it deals only with things that can be observed. An observation is anything that is detected either through human senses or with instruments and measuring devices that extend human senses. Things that cannot be observed or measured by current means—such as supernatural beings or e...	B: observation.
The white fluffy part of popcorn is also what? Here are the choices: A. phosphor B. jiffy C. membrane D. endosperm		D: endosperm.
What change can you expect in vectors that are perpendicular to each other? Here are the choices: A. Chemical reaction B. Large Effect C. no effect D. Molecular Reaction	Vectors that are perpendicular to each other have no effect on each other.	C: no effect.
Where is roughage fermented and digested in pseudo-ruminants? Here are the choices: A. in their cecum B. in their ileum C. in their appendix D. in their pancreas	Pseudo-ruminants Some animals, such as camels and alpacas, are pseudo-ruminants. They eat a lot of plant material and roughage. Digesting plant material is not easy because plant cell walls contain the polymeric sugar molecule cellulose. The digestive enzymes of these animals cannot break down cellulose, but microorgan...	A: in their cecum.
How quickly a population changes in size over time is known as what? Here are the choices: A. population impact rate B. population growth rate C. population direction rate D. population multiplication rate	The population growth rate is how quickly a population changes in size over time. The rate of growth of a population may be positive or negative. A positive growth rate means that the population is increasing in size because more people are being added than lost. A negative growth rate means that the population is decr...	B: population growth rate.
Electromagnetic waves transfer energy across space as well as through what? Here are the choices: A. matter B. osmosis C. filtering D. plasma	Electromagnetic waves transfer energy across space as well as through matter. They vary in their wavelengths and frequencies, and higher-frequency waves have more energy. The full range of wavelengths of electromagnetic waves, shown in the Figure below , is called the electromagnetic spectrum.	A: matter.
What is the term for abnormally low blood levels of carbon dioxide? Here are the choices: A. trichina B. hypocapnia C. spirogyra D. hepatitis	The chemical reactions that regulate the levels of CO2 and carbonic acid occur in the lungs when blood travels through the lung’s pulmonary capillaries. Minor adjustments in breathing are usually sufficient to adjust the pH of the blood by changing how much CO2 is exhaled. In fact, doubling the respiratory rate for les...	B: hypocapnia.
The vivid colors of flowers are an adaptation designed to encourage what by animals such as insects and birds? Here are the choices: A. flowering B. pollination C. consumption D. eating	Figure 26.13 These flowers grow in a botanical garden border in Bellevue, WA. Flowering plants dominate terrestrial landscapes. The vivid colors of flowers are an adaptation to pollination by animals such as insects and birds. (credit: Myriam Feldman).	B: pollination.
Arthropods change into the adult form in a process called what? Here are the choices: A. budding B. metamorphosis C. spontaneous mutation D. parthenogenesis	Arthropods have a life cycle with sexual reproduction. Most species go through larval stages after hatching. The larvae are very different from the adults. They change into the adult form in a process called metamorphosis . This may take place within a cocoon. A familiar example of metamorphosis is the transformation o...	B: metamorphosis.
What is the largest part of the brain? Here are the choices: A. cerebellum B. limbic system C. cerebrum D. stem	The cerebrum is the largest part of the brain. It controls conscious functions such as reasoning, language, sight, touch, and hearing. It is divided into two hemispheres, or halves. The hemispheres are very similar but not identical to one another. They are connected by a thick bundle of axons deep within the brain. Ea...	C: cerebrum.
What type of weathering breaks rock into smaller pieces? Here are the choices: A. fluid weathering B. chemical weathering C. chemical erosion D. mechanical weathering	Mechanical weathering breaks rock into smaller pieces. These smaller pieces are just like the bigger rock; they're just smaller! The rock has broken without changing its composition. The smaller pieces have the same minerals in the same proportions. You could use the expression “a chip off the old block“ to describe me...	D: mechanical weathering.
The coordination sphere consists of the central metal ion or atom plus its attached what? Here are the choices: A. molecules B. subunits C. strands D. ligands	The coordination sphere consists of the central metal ion or atom plus its attached ligands. Brackets in a formula enclose the coordination sphere; species outside the brackets are not part of the coordination sphere. The coordination number of the central metal ion or atom is the number of donor atoms bonded to it. Th...	D: ligands.
What functions like a flexible coat of armor, preventing the protist from being torn or pierced without compromising its range of motion? Here are the choices: A. endothelium B. biofilm C. pellicle D. fimbriae	Cell Structure The cells of protists are among the most elaborate of all cells. Most protists are microscopic and unicellular, but some true multicellular forms exist. A few protists live as colonies that behave in some ways as a group of free-living cells and in other ways as a multicellular organism. Still other prot...	C: pellicle.
The marine west coast climate gets lots of rain because of what being nearby? Here are the choices: A. the ocean B. the mountains C. highways D. the Sun	The marine west coast climate gets lots of rain from the nearby ocean.	A: the ocean.
What determines whether a volcanic eruption will be explosive or not? Here are the choices: A. thickness of magma B. magma velocity C. lava temperature D. curve of magma	Volcanic eruptions can be non-explosive or explosive depending on the thickness of the magma.	A: thickness of magma.
Platinum and gold are useful materials for constructing circuits because of their ability to resist what? Here are the choices: A. nitrogen B. decomposition C. Electricity D. oxidation	If something is MULTIcolored, it has many colors.	D: oxidation.
How many set of chromosomes do moss have? Here are the choices: A. double set B. none C. triple set D. single set	That may depend on the plant. Start with moss. The typical nonvascular plant. But such a simple plant has a very interesting life cycle. Whereas most kinds of plants have two sets of chromosomes in their vegetative cells, mosses have only a single set of chromosomes. So, how does meiosis occur?.	D: single set.
When you change a magnetic field through electromagnetic induction what do you create? Here are the choices: A. cooling current B. Light Current C. microwave current D. electric current	The process of generating electric current with a changing magnetic field is called electromagnetic induction . It occurs whenever a magnetic field and an electric conductor, such as a coil of wire, move relative to one another. As long as the conductor is part of a closed circuit, current will flow through it whenever...	D: electric current.
Morphological and molecular data indicate that wings evolved how many times in insects? Here are the choices: A. twice B. once C. many times D. never		B: once.
Nonmetal structures contain what type of bonds? Here are the choices: A. gravitational B. polymeric C. covalent D. prevalent	Structures of the Nonmetals The structures of the nonmetals differ dramatically from those of metals. Metals crystallize in closely packed arrays that do not contain molecules or covalent bonds. Nonmetal structures contain covalent bonds, and many nonmetals consist of individual molecules. The electrons in nonmetals ar...	C: covalent.
Gas lines should be made of what so they do not rupture? Here are the choices: A. adjustment material B. Hard material C. flexible material D. typically material	Check to see that gas lines are made of flexible material so they do not rupture. Any equipment that uses gas should be well secured.	C: flexible material.
What is the lipid-rich sheath that surrounds the axon and facilitates the transmission of electrical signals along the axon? Here are the choices: A. receptors sheath B. myelin sheath C. axon sheath D. neural sheath	Myelin The insulation for axons in the nervous system is provided by glial cells, oligodendrocytes in the CNS, and Schwann cells in the PNS. Whereas the manner in which either cell is associated with the axon segment, or segments, that it insulates is different, the means of myelinating an axon segment is mostly the sa...	B: myelin sheath.
Where is urine formed in the body? Here are the choices: A. the kidneys B. the lungs C. the liver D. the pancreas	Urine is a liquid that is formed by the kidneys when they filter wastes from the blood. Urine contains mostly water, but it also contains salts and nitrogen-containing molecules. The amount of urine released from the body depends on many things. Some of these include the amount of fluid and food a person consumes and h...	A: the kidneys.
What is the term for rain consisting of water with a ph below 5? Here are the choices: A. carbon rain B. acid rain C. produce rain D. Hot Rain	Acid rain is rain that has a pH less than 5 ( Figure below ). Acidity is measured on the pH scale . Lower numbers are more acidic, and higher numbers are less acidic (also called more alkaline ). An acid has a pH of less than 7. The pH of normal rain is 5.6. It’s slightly acidic because carbon dioxide in the air dissol...	B: acid rain.
What type of ecosystem do polar bears live in? Here are the choices: A. arctic B. oceanic C. tropical D. natural	Polar Bears. Thick fur and a layer of blubber keep polar bears warm in their Arctic ecosystem. Why do you think their fur is white? Why might it be an adaptation in an Arctic biome?.	A: arctic.
Pseudopods are false what? Here are the choices: A. feet B. fingers C. eyes D. teeth	What is a cell? Gradient Physical difference between two regions of space, in such a way that the molecules tend to move in response to the gradients. Diffusion Movement of the molecules in a fluid, from the regions of high concentration to those of low concentration. Passive transport Movement of substances in a membr...	A: feet.
Ionic bonds are what kind of attraction between ions? Here are the choices: A. kinetic B. magnetic C. nuclear D. electrostatic	Ionic bonding. Ionic bonds result from electrostatic attractions between positively and negatively charged side chains of amino acids. For example, the mutual attraction between an aspartic acid carboxylate ion and a lysine ammonium ion helps to maintain a particular folded area of a protein (part (a) of http://catalog...	D: electrostatic.
What type of change occurs when matter changes chemically into an entirely different substance with different chemical properties? Here are the choices: A. chemical B. genetic C. physical D. material	Did you ever make a "volcano," like the one in Figure below , using baking soda and vinegar? What happens when the two substances combine? They produce an eruption of foamy bubbles. This happens because of a chemical change. A chemical change occurs when matter changes chemically into an entirely different substance wi...	A: chemical.
Australia is home to many endemic species. the (a) wallaby (wallabia bicolor), a medium-sized member of the kangaroo family, is a pouched mammal, or this? Here are the choices: A. rodent B. placental C. marsupial D. primate	Throughout Chemistry, you will find features that draw the students into scientific inquiry by taking selected topics a step further. Students and educators alike will appreciate discussions in these feature boxes. Chemistry in Everyday Life ties chemistry concepts to everyday issues and real-world applications of scie...	C: marsupial.
What do you call structures like a whale's pelvic bones, which were once attached to legs, or wings that cannot be used for flight? Here are the choices: A. primitive B. distinctive C. primordial D. vestigial	Penguins do not use their wings, known as flippers, to fly in the air. However, they do use them to move in the water. The theory of evolution suggests that penguins evolved to use their wings for a different purpose. A whale’s pelvic bones, which were once attached to legs, are also vestigial structures. Whales are de...	D: vestigial.
What type of hybridization does ammonia undergo? Here are the choices: A. ionic hybridization B. sp 3 hybridization C. h2O hybridization D. nh3 hybridization	The methane and ammonia examples illustrate the connection between orbital hybridization and the VSEPR model. The electron domain geometry predicted by VSEPR leads directly to the type of hybrid orbitals that must be formed to accommodate that geometry. Both methane and ammonia have tetrahedral electron domain geometri...	B: sp 3 hybridization.
What does increased temperature do to a substance's kinetic energy? Here are the choices: A. increases B. nothing C. generates D. decreases	Entropy increases as temperature increases. An increase in temperature means that the particles of the substance have greater kinetic energy. The faster moving particles have more disorder than particles that are moving more slowly at a lower temperature.	A: increases.
What natural process is associated with the death of cells? Here are the choices: A. dissolving B. aging C. reducing D. cooling	6. Aging is associated with the death of cells. Give two reasons why cells die.	B: aging.
What color and shape are cumulus clouds? Here are the choices: A. dark and wispy B. white and wispy C. dark and tall D. white and puffy	Cumulus clouds are white and puffy. Convection currents make them grow upward, and they may grow very tall. When they produce rain, they are called cumulonimbus.	D: white and puffy.
During the early paleozoic, the amount of carbon dioxide in the atmosphere compared to today was? Here are the choices: A. much lower B. none C. much greater D. the same	During the early Paleozoic, the amount of carbon dioxide in the atmosphere was much greater than it is today. This may have begun to change later, as land plants became more common. As the roots of land plants began to infiltrate rock and soil began to form, carbon dioxide was drawn out of the atmosphere and became tra...	C: much greater.
Physical science is defined as the study of what? Here are the choices: A. light & matter B. matter & elements C. matter & energy D. biology & light	Look at the topographic map of Stowe, Vermont ( Figure below ). There is a steep hill rising just to the right of the city of Stowe. You can tell this because the contour lines there are closely spaced. The contour lines also show that the hill has a sharp rise of about 200 feet. Then the slope becomes less steep towar...	C: matter & energy.
What do you call the two ends of a magnet where the magnetic effect is strongest? Here are the choices: A. magnetos B. poles C. opposites D. plates	Any magnet has two ends called poles where the magnetic effect is strongest.	B: poles.
The scale that is used to measure the loudness of sound measures their loudness in what? Here are the choices: A. weight B. centimeters C. decibels D. waves	The most common cause of hearing loss is exposure to loud sounds. Loud sounds can damage hair cells inside the ears. Hair cells change sound waves to electrical signals that the brain can interpret as sounds. Louder sounds, which have greater intensity than softer sounds, can damage hair cells more quickly than softer ...	C: decibels.
What are located on either side of the pharynx in the throat? Here are the choices: A. wrinkles B. lymph nodes C. testicles D. tonsils	The tonsils are located on either side of the pharynx in the throat. They trap pathogens, which are destroyed by lymphocytes in the tonsils.	D: tonsils.
What kind of reproduction requires the fusion of male and female gametes? Here are the choices: A. autonomous reproduction B. subject reproduction C. sexual reproduction D. asexual reproduction		C: sexual reproduction.
Diseases of the lungs, bronchial tubes, trachea, nose, and throat affect what organ system? Here are the choices: A. skin B. digestive C. heart D. respiratory	Respiratory diseases are diseases of the lungs, bronchial tubes, trachea, nose, and throat ( Figure below ). These diseases can range from a mild cold to a severe case of pneumonia. Respiratory diseases are common. Many are easily treated, while others may cause severe illness or death. Some respiratory diseases are ca...	D: respiratory.
What factor other than genes is important in determining adult height? Here are the choices: A. relaxation B. nutrition C. cultivation D. intelligence	Genes play an important part in determining our adult height. However, factors such as poor nutrition can prevent us from achieving our full genetic potential.	B: nutrition.
What does burning wood release into the atmosphere? Here are the choices: A. helium B. carbon dioxide C. oxygen D. hydrogen chloride	Forests are also being destroyed. Trees may be cut down for their wood, or they may be burned to clear the land for farming. Burning wood releases more carbon dioxide into the atmosphere. You can see how a tropical rainforest was cleared for farming in Figure below . With forests shrinking, there are fewer trees to rem...	B: carbon dioxide.
The largest region of each of the palatine bone is the what? Here are the choices: A. big plate B. magnetic plate C. abnormal plate D. horizontal plate	Palatine Bone The palatine bone is one of a pair of irregularly shaped bones that contribute small areas to the lateral walls of the nasal cavity and the medial wall of each orbit. The largest region of each of the palatine bone is the horizontal plate. The plates from the right and left palatine bones join together at...	D: horizontal plate.
What does viscosity do to liquids? Here are the choices: A. salinity to flowing B. responsive to flowing C. condusive to flowing D. resistant to flowing	Viscosity is a liquid’s resistance to flowing. You can think of it as friction between particles of liquid. Thicker liquids are more viscous than thinner liquids. For example, the honey pictured in the Figure below is more viscous than the vinegar. You can learn more about viscosity at this URL: http://chemed. chem. wi...	D: resistant to flowing.
What system is involved in diseases that include type 1 diabetes, rheumatoid arthritis and multiple sclerosis? Here are the choices: A. immune system B. digestion system C. nervous system D. circulatory system	One example is type 1 diabetes . In this disease, the immune system attacks cells of the pancreas. Other examples are multiple sclerosis and rheumatoid arthritis. In multiple sclerosis , the immune system attacks nerve cells. This causes weakness and pain. In rheumatoid arthritis , the immune system attacks the cells o...	A: immune system.
What are are organisms that feed on small pieces of organic matter? Here are the choices: A. deposit feeders B. difference feeders C. waste feeders D. bottom feeders	Deposit feeders, which are organisms that feed on small pieces of organic matter, usually in the top layer of soil. Sea cucumbers are deposit feeders, living on the ocean floor. They eat the tiny scrap particles that are usually abundant in the environments that they inhabit.	A: deposit feeders.
What process would be impossible without some variation in the inherited traits of organisms within a species? Here are the choices: A. characteristic selection B. environmental selection C. natural selection D. darwin's selection	There is some variation in the inherited traits of organisms within a species. Without this variation, natural selection would not be possible.	C: natural selection.
Monoecious flowers are also known as “perfect” flowers because they contain both types of what organ? Here are the choices: A. sex organ B. respiratory organ C. phloem D. vascular organ	groups of angiosperms: the monocots and the eudicots. Seed food reserves are stored outside the embryo, in the form of complex carbohydrates, lipids or proteins. The cotyledons serve as conduits to transmit the broken-down food reserves from their storage site inside the seed to the developing embryo. The seed consists...	A: sex organ.
Human beings depend on learned behaviors more than any other? Here are the choices: A. mammals B. Beings C. species D. Organisms	Human beings depend on learned behaviors more than any other species. Think about some of the behaviors you have learned. They might include making a bed, riding a bicycle, using a computer, and playing a sport, to name just a few. You may have learned each of the behaviors in different ways. There are several differen...	C: species.
Oxygen, carbon, hydrogen and what other element make up approximately 96% of living matter? Here are the choices: A. calcium B. silicon C. nitrogen D. helium		C: nitrogen.
What type electrical circuits have multiple paths the current may take? Here are the choices: A. serial B. parallel C. single loop D. perpendicular	Parallel electrical circuits have multiple paths the current may take.	B: parallel.
Hydrophobic interactions arise because water molecules engage in what type of bonding with other water molecules? Here are the choices: A. oxygen bonding B. aquatic bonding C. helium bonding D. hydrogen bonding	high proportion of amino acids in the protein have nonpolar side chains. The term hydrophobic interaction is often misused as a synonym for dispersion forces. Hydrophobic interactions arise because water molecules engage in hydrogen bonding with other water molecules (or groups in proteins capable of hydrogen bonding)....	D: hydrogen bonding.
What is the second most common skin cancer? Here are the choices: A. precancerous cell carcinoma B. basal cell carcinoma C. melanoma D. squamous cell carcinoma	Squamous Cell Carcinoma Squamous cell carcinoma is a cancer that affects the keratinocytes of the stratum spinosum and presents as lesions commonly found on the scalp, ears, and hands (Figure 5.19). It is the second most common skin cancer. The American Cancer Society reports that two of 10 skin cancers are squamous ce...	D: squamous cell carcinoma.
Species divergence often, but not always, occurs because of what type of barrier between species? Here are the choices: A. visible B. emotional C. physical D. language	Sympatric Speciation Can divergence occur if no physical barriers are in place to separate individuals who continue to live and reproduce in the same habitat? The answer is yes. The process of speciation within the same space is called sympatric speciation; the prefix “sym” means same, so “sympatric” means “same homela...	C: physical.
The chytrids the only class in the phylum chytridiomycota is the chytridiomycetes. the chytrids are the simplest and most primitive eumycota, or true this? Here are the choices: A. proteins B. organisms C. fungi D. acids	Chytridiomycota: The Chytrids The only class in the Phylum Chytridiomycota is the Chytridiomycetes. The chytrids are the simplest and most primitive Eumycota, or true fungi. The evolutionary record shows that the first recognizable chytrids appeared during the late preCambrian period, more than 500 million years ago. L...	C: fungi.
Almost all vascular plants have mycorrhizae and rely on their fungal partners for what? Here are the choices: A. respiration B. nutrients C. sunlight D. air		B: nutrients.
What occurs when there is a sudden and large falling of rocks down a slope? Here are the choices: A. tsunami B. earthquake C. avalanche D. landslide	Landslides are sudden and massive falls of rock down a slope. Landslides may be very destructive or even deadly. Slump and creep are slower types of mass wasting.	D: landslide.
What are gymnosperms lacking compared to most angiosperms? Here are the choices: A. use elements B. muscle elements C. vessel elements D. vascular elements		C: vessel elements.
Calculations are described showing conversions between molar mass and what for gases? Here are the choices: A. weight B. density C. volume D. length	Calculations are described showing conversions between molar mass and density for gases.	B: density.
What sudden ground movement is caused by the sudden release of the energy stored in rocks, which is transmitted in seismic waves? Here are the choices: A. eruption B. earthquake C. sandstorm D. quicksand	An earthquake is sudden ground movement. This movement is caused by the sudden release of the energy stored in rocks. An earthquake happens when so much stress builds up in the rocks that the rocks break. An earthquake’s energy is transmitted by seismic waves.	B: earthquake.
What is the name for the cooler, darker areas on the sun’s surface? Here are the choices: A. aurora borealis B. corona C. sunspots D. anomalies	The most noticeable magnetic activity of the Sun is the appearance of sunspots. Sunspots are cooler, darker areas on the Sun’s surface ( Figure below ). Sunspots occur in an 11 year cycle. The number of sunspots begins at a minimum. The number gradually increases to the maximum. Then the number returns to a minimum aga...	C: sunspots.
Plants need sunlight for what process? Here are the choices: A. metamorphosis B. photosynthesis C. cyclogenesis D. glycolysis	The water in a large lake may be so deep that sunlight cannot penetrate all the way to the bottom. Without sunlight, water plants and algae cannot live on the bottom of the lake. That’s because plants need sunlight for photosynthesis.	B: photosynthesis.
The vast majority of what phenomena occurs along one of three types of plate boundaries? Here are the choices: A. tornados B. earthquake C. hurricane D. volcanoes	Nearly 95% of all earthquakes take place along one of the three types of plate boundaries. As you learned in the Plate Tectonics chapter, scientists use the location of earthquakes to draw plate boundaries.	B: earthquake.
What weather events move with the prevailing winds and originate in the trade winds in the northern hemisphere? Here are the choices: A. earthquakes B. droughts C. hurricanes D. tsunamis	Hurricanes move with the prevailing winds. In the Northern Hemisphere, they originate in the trade winds and are blown to the west. When they reach the westerlies, they switch direction. So they travel toward the north or northeast. You can look at a map of hurricane tracks to see this happen ( Figure below ). Hurrican...	C: hurricanes.
What is the name for the male reproductive organs or gonads? Here are the choices: A. testes B. ovaries C. anus D. nucleus	Testes The testes (singular = testis) are the male gonads—that is, the male reproductive organs. They produce both sperm and androgens, such as testosterone, and are active throughout the reproductive lifespan of the male. Paired ovals, the testes are each approximately 4 to 5 cm in length and are housed within the scr...	A: testes.
What glands in the breast secrete milk? Here are the choices: A. primordial glands B. fetal glands C. adrenal glands D. mammary glands	The breasts are not directly involved in reproduction, but they nourish a baby after birth. Each breast contains mammary glands, which secrete milk. The milk drains into ducts leading to the nipple. A suckling baby squeezes the milk out of the ducts and through the nipple.	D: mammary glands.
Sutures, gomphoses, and syndesmoses are types of what, which are found where adjacent bones are strongly united by connective tissue? Here are the choices: A. metallic joints B. cartilage C. ligaments D. fibrous joints	9.2 Fibrous Joints Fibrous joints are where adjacent bones are strongly united by fibrous connective tissue. The gap filled by connective tissue may be narrow or wide. The three types of fibrous joints are sutures, gomphoses, and syndesmoses. A suture is the narrow fibrous joint that unites most bones of the skull. At ...	D: fibrous joints.
Heat, electricity, or light might provide what necessary input to the process of decomposition? Here are the choices: A. source B. material C. energy D. food	Most decomposition reactions require an input of energy in the form of heat, light, or electricity.	C: energy.
What is made up of a watery substance called cytosol and contains other cell structures such as ribosomes? Here are the choices: A. rna B. plasma C. cytoskeleton D. cytoplasm	Cytoplasm refers to all of the cellular material inside the plasma membrane. Cytoplasm is made up of a watery substance called cytosol and contains other cell structures such as ribosomes.	D: cytoplasm.

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