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Why do bears hibernate? (A) use greater resources (B) one celled organisms (C) they are lazy (D) conserve energy (E) When it's cold (F) hard outer covering (G) hydration (H) more sleep | bears hibernate to conserve energy | qasc | Learned behaviors are adaptive because they are flexible. They can change if the environment changes. |
What powers rockets? (A) supersonic (B) a hydraulic system (C) sun's heat (D) Mechanical energy (E) direct energy (F) fossil fuels (G) hydrogen and oxygen (H) electromagnetic energy | Mechanical energy powers rockets. | qasc | State defense forces ( SDF ; also known as state military , state guards , or state military reserves ) in the United States are military units that operate under the sole authority of a state government; they are partially regulated by the National Guard Bureau but they are not a part of the Army National Guard... |
What two planets is the asteroid belt found between? (A) mars and jupiter (B) mars and venus (C) earth and venus (D) saturn and uranus ### Answer: | Hundreds of thousands of asteroids have been found in our solar system. They are still being discovered at a rate of about 5,000 new asteroids per month! The majority are located in between the orbits of Mars and Jupiter. This region is called the asteroid belt , as shown in Figure below . There are many thousands of a... | sciq | |
Adult tulip bulbs are what shape? (A) barrel-shaped (B) a prism (C) Something to move (D) fertile (E) epidermal (F) solid, liquid, gas (G) revolving (H) reflecting light | Adult tulip bulbs are barrel-shaped | qasc | Diseases of the nervous system include infections, epilepsy, strokes, and Alzheimer’s disease. Injuries include concussions and spinal cord damage that may cause paralysis. Most nervous system diseases can’t be prevented, but many nervous system injuries can be prevented by following safe practices. |
Like bacteria, archaea can have what to assist with movement? (A) flagella (B) cilia (C) antennae (D) sporangia ### Answer: | Like bacteria, archaea can have flagella to assist with movement. | sciq | Crop productivity decreases during a drought. |
Intrusive igneous rocks cool from magma slowly in the crust and have large what? (A) crystals (B) pores (C) atoms (D) coal deposits ### Answer: | Intrusive igneous rocks cool from magma slowly in the crust. They have large crystals. | sciq | Fault movement causes the ground to shake. |
where is the indian air force academy located | in 1969 and started in 1971. It is located at Dundigal, about 25 km away from the twin cities of Hyderabad and Secunderabad , spread over 7,000 acres of land.
The academy was set up to train cadet | natural_questions | sheep can feed at more than one trophic level |
What type of oceans are hostile to algae and cytoplankton? (A) warmer (B) deeper (C) shallower (D) colder ### Answer: | Warmer oceans are hostile to algae and cytoplankton , which are the most important absorbers of carbon dioxide. The loss of these two photosynthesizers would remove the most important natural sink. | sciq | culture (outside the body under optimal growing conditions), the length of the cycle is about 24 hours. In rapidly dividing human cells with a 24-hour cell cycle, the G1 phase lasts approximately nine hours, the S phase lasts 10 hours, the G2 phase lasts about four and one-half hours, and the M phase lasts approximatel... |
what is the area code for dallas tx | Area codes 214, 469, and 972 are the North American telephone area codes for Dallas, Texas , and most of the eastern portion of the Dallas–Fort Worth metroplex .
T | natural_questions | Most people can survive only a few days without a combination of hydrogen and oxygen |
What is the shortest phase of the sexual response cycle? (A) the orgasm (B) sexual stimulation (C) plateau phase (D) resolution phase ### Answer: | sciq | sight involves the retina | |
What are intervertebral discs made of? (A) fibrocartilage (B) intercartilage (C) fibrotissue (D) connective cartilage ### Answer: | Figure 9.3 Intervertebral Disc An intervertebral disc unites the bodies of adjacent vertebrae within the vertebral column. Each disc allows for limited movement between the vertebrae and thus functionally forms an amphiarthrosis type of joint. Intervertebral discs are made of fibrocartilage and thereby structurally for... | sciq | United States Air Force Basic Military Training (also known as BMT or boot camp) is an eight-week program of physical and mental training required in order for an individual to become an enlisted Airman in the United States Air Force . It is located at Lackland Air Force Base in San Antonio , Texas . |
What organism is responsible for most decomposition in forest? (A) fungi (B) coral (C) bacteria (D) yeast ### Answer: | Most fungi are decomposers. They are the main decomposers in forests. Many fungi have symbiotic relationships with other species. | sciq | An electron microscope is used for seeing things magnified. |
creating paper may cause (A) Physical weathering (B) Something to move (C) destroying life (D) It expands (E) Greenhouse gases (F) contamination (G) Pollution (H) harmful substances | creating paper may cause destroying life. | qasc | Frogs have permeable skin that easily absorbs substances from the environment. |
What can decompose wood? (A) sugar (B) pine (C) bushes (D) ferns (E) bamboo (F) trees (G) Molds (H) Oak | molds can decompose wood | qasc | Note: Atomic mass is given to three decimal places, if known. Now that we understand that atoms have mass, it is easy to extend the concept to the mass of molecules. The molecular mass is the sum of the masses of the atoms in a molecule. This may seem like a trivial extension of the concept, but it is important to coun... |
what was the written law code of the romans | um" title="Ius scriptum">ius scriptum and ius non scriptum – meaning written and unwritten law, respectively. In practice, the two differed by the means of their creation and not necessarily whether or not they were written down. The ius scriptum was the body of statute laws made by the legislature. The laws wer... | natural_questions | Area code
City or metropolitan area
55
Mexico City
81
Monterrey, Nuevo León
33
Guadalajara, Jalisco
656
Ciudad Juárez, Chihuahua
614
Chihuahua, Chihuahua
618
Durango, Durango
999
Mérida, Yucatán
222 / 221
Puebla, Puebla
4... |
What kind of chain is formed by subduction of oceanic crust beneath a continental or oceanic plate? (A) volcano (B) chain reaction (C) tsunami (D) mountain ### Answer: | Subduction of oceanic crust beneath a continental or oceanic plate creates a chain of volcanoes. | sciq | Birds have backbones |
What is the term for the maintenance of a steady state despite internal and external changes? (A) homeostasis (B) equilibrium (C) hypothesis (D) consciousness ### Answer: | sciq | Most mammals have a body covering for keeping warm | |
What does increased temperature do to a substance's kinetic energy? (A) increases (B) generates (C) nothing (D) decreases ### Answer: | 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. | sciq | Secondary growth forms secondary blood vessels |
High pressure systems can cause what? (A) global warming (B) hyperthyroidism (C) Dehydration (D) Greenhouse gases (E) symptoms (F) flooding (G) good visibility (H) harmful substances | High pressure systems can cause good visibility. | qasc | Red blood cells carry proteins called antigens on their surface. People may vary in the exact antigens their red blood cells carry. The specific proteins are controlled by the genes they inherit from their parents. The particular antigens you inherit determine your blood type. |
What type of energy travels through space as electrical and magnetic waves? (A) electromagnetic energy (B) sound energy (C) mechanical energy (D) solar energy ### Answer: | 4. Electromagnetic energy is energy that travels through space as electrical and magnetic waves. The light flooding the stage in the Figure above is one type of electromagnetic energy. Other types include radio waves, microwaves, X rays, and gamma rays. | sciq | Living species of chordates are classified into three major subphyla: Vertebrata, Urochordata, and Cephalochordata. Vertebrates are all chordates that have a backbone. The other two subphyla are invertebrate chordates that lack a backbone. |
The ozone layer protects the earth from what? (A) uv radiation (B) pollution (C) light waves (D) radio waves ### Answer: | Plants maintain the atmosphere. They produce oxygen and absorb carbon dioxide during photosynthesis. Oxygen is essential for cellular respiration for all aerobic organisms. It also maintains the ozone layer that helps protect Earth’s life from damaging UV radiation. Removal of carbon dioxide from the atmosphere reduces... | sciq | Just as the burning of wood releases energy in the form of heat, many other chemical reactions also release heat. There are also chemical reactions, such as photosynthesis in plants, which absorb energy in the form of heat. The study of energy changes in chemical reactions is called thermochemistry . The broader term t... |
A solution is what type of mixture, where the dissolved particles are spread evenly through the mixture? (A) homogeneous (B) saline (C) gaseous (D) heterogeneous ### Answer: | A solution is a mixture of two or more substances, but it’s not just any mixture. A solution is a homogeneous mixture. In a homogeneous mixture, the dissolved particles are spread evenly through the mixture. The particles of the solution are also too small to be seen or to settle out of the mixture. To put solutions in... | sciq | rnet country code top-level domain ( ccTLD ) for India .
The domain is operated by <A href="/wiki/INRegistry" title="INR |
Where do biochemical reactions take place? (A) inside the organisms' cells (B) between cells (C) in atoms (D) outside of cells ### Answer: | Biochemical reactions are chemical reactions that take place inside the cells of organisms. | sciq | The structure of the different types of blood vessels reflects their function or layers. There are three distinct layers, or tunics, that form the walls of blood vessels (Figure 40.16). The first tunic is a smooth, inner lining of endothelial cells that are in contact with the red blood cells. The endothelial tunic is ... |
What can occur when one end of a small diameter tube is immersed in liquid? (A) capillary action (B) diffusion action (C) transfusion action (D) thermal action ### Answer: | Towels soak up liquids like water because the fibers of a towel are made of molecules that are attracted to water molecules. Most cloth towels are made of cotton, and paper towels are generally made from paper pulp. Both consist of long molecules of cellulose that contain many −OH groups. Water molecules are attracted ... | sciq | An element is a pure substance. It cannot be separated into any other substances. There are more than 90 different elements that occur in nature. Some are much more common than others. Hydrogen is the most common element in the universe. Oxygen is the most common element in Earth’s crust. Figure below shows other examp... |
Toxic food causes harm to what? (A) Endocrine system (B) small stones (C) water eaters (D) living things (E) animals (F) organic molecules (G) consumers (H) toxic plants | Toxic food causes harm to living things | qasc | astronauts require energy for extended flights |
what can wood be burned for? (A) cleaning (B) fuel (C) cooking (D) food (E) cooling (F) warmth (G) magnetisation (H) energy | wood can be burned for cooking | qasc | growth is caused by glands |
Atoms that have gained electrons and become negatively charged are called what? (A) negative ions (B) negative atoms (C) cations (D) anions ### Answer: | Changes to the nucleus of an atom require tremendous amounts of energy, so protons are not easily gained or lost by atoms. Electrons, on the other hand, are held fairly loosely and can often be removed quite easily. When an object loses some electrons, the remaining object is now positively charged because it has an ex... | sciq | Most pituitary hormones control integrating centers |
What will happen if the gas particles inside an inflated balloon suddenly stop moving? (A) balloon deflates (B) balloon falls (C) balloon bursts (D) balloon inflates ### Answer: | Gas molecules also exert pressure. Earth’s atmosphere exerts pressure because gravity acts on the huge number of gas particles contained in the atmosphere, holding it in place. Pressure is also exerted by a small sample of gas, such as that which is contained in a balloon. Gas pressure is the pressure that results from... | sciq | echinoids lack a centralized nervous system |
What is the term for daily cycles of behavior, like the sleep-wake cycle? (A) circadian rhythms (B) daily rhythms (C) variable rhythms (D) behavioral rhythms ### Answer: | Animals may eat and drink at certain times of day as well. Humans have daily cycles of behavior, too. Most people start to get sleepy after dark and have a hard time sleeping when it is light outside. Daily cycles of behavior are called circadian rhythms . | sciq | current Chief of Staff of the Air Force is General David L. Goldfein .
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What are the only organisms that can perform photosynthesis? (A) autotrophs (B) sponges (C) monocots (D) heterotrophs ### Answer: | CHAPTER SUMMARY 5.1 Overview of Photosynthesis The process of photosynthesis transformed life on earth. By harnessing energy from the sun, photosynthesis allowed living things to access enormous amounts of energy. Because of photosynthesis, living things gained access to sufficient energy, allowing them to evolve new s... | sciq | The enthalpy of the reactants is greater than the enthalpy of the products. During the course of the reaction, heat is released to the surroundings. |
What type of chemistry is the study of chemicals containing carbon called? (A) organic chemistry (B) inorganic chemistry (C) biochemistry (D) bioanalytical chemistry ### Answer: | Organic chemistry is the study of chemicals containing carbon. Carbon is one of the most abundant elements on Earth and is capable of forming a tremendously vast number of chemicals (over twenty million so far). Most of the chemicals found in all living organisms are based on carbon. | sciq | In the U.S., the SAT Subject Test in Mathematics Level 2 (formerly known as Math II or Math IIC , the "C" representing the sanctioned use of a calculator) is a one-hour multiple choice test . The questions cover a broad range of topics. Approximately 10-14% of questions focus on numbers and operat... |
What can low iron cause? (A) contamination (B) Pollution (C) decrease stamina (D) harmful substances (E) immunodeficiency (F) the ground shaking (G) cloudy and rainy weather (H) Temperature changing | low iron can cause immunodeficiency | qasc | a mold spore has a negative impact on breathing |
Trimethylamine is one of the substances responsible for the what of spoiled fish? (A) smell (B) appearance (C) decay (D) feel ### Answer: | yellow liquid used in the production of synthetic rubber. Its condensed structural formula is ClSSCl. Ethylene glycol is the major ingredient in antifreeze. Its condensed structural formula is HOCH2CH2OH. Trimethylamine is one of the substances responsible for the smell of spoiled fish. Its condensed structural formula... | sciq | |
a coating does what to the transfer of electricity (A) amplifies (B) energy (C) heat (D) causes (E) slows (F) reduce (G) enables (H) retina | a coating slows the transfer of electricity | qasc | Figure 3.9 (a) A typical human brain weighs about 1.5 kg and occupies a volume of roughly 1.1 L. (b) Information is transmitted in brain tissue and throughout the central nervous system by specialized cells called neurons (micrograph shows cells at 1600× magnification). Specialized cells called neurons transmit informa... |
What is the name for the water-splitting step of photosynthesis? (A) photolysis (B) hydrolysis (C) peristalsis (D) cellular respiration ### Answer: | sciq | Symbol
Meaning
SI unit of measure
A
{\displaystyle A}
area
meter squared (m 2 )
magnetic vector potential
amplitude
meter
atomic mass number
a
... | |
What can help a fire to continue burning? (A) energy (B) Conifers (C) Boiling water (D) Extinguishing it (E) Fanning it (F) bamboo (G) Removing fuel (H) sweating | Fanning a fire helps it to continue burning. | qasc | Mitochondria are thought to have evolved from ancient prokaryotic cells. |
In what form do organisms use lipids? (A) Triglycerides (B) glucose (C) layers of fat (D) adding heat (E) reducing acid rain (F) hydrocarbons (G) recycling (H) By wind and rain | Organisms use lipids in the form of Triglycerides | qasc | Today, fungi are no longer classified as plants. We now know that they have unique physical, chemical, and genetic traits that set them apart from plants and other eukaryotes. For example, the cell walls of fungi are made of chitin , not cellulose. Also, fungi absorb nutrients from other organisms, whereas plants make ... |
The weather conditions in an area over time is also called a what? (A) climate (B) biome (C) habitat (D) landscape ### Answer: | sciq | Sensory-Somatic Nervous System The sensory-somatic nervous system is made up of cranial and spinal nerves and contains both sensory and motor neurons. Sensory neurons transmit sensory information from the skin, skeletal muscle, and sensory organs to the CNS. Motor neurons transmit messages about desired movement from t... | |
What do plants to when the days get shorter? (A) produce light (B) Exfoliation (C) flower (D) go dormant (E) Chemical energy (F) reusing things (G) stagnate (H) move | some plants are dormant when the days are shorter | qasc | A flower's purpose is to be planted |
A mushroom is only a specialised reproductive part of the whole fungus. the main part of the fungi is underground in a whole web of hyphae, called this? (A) mycelium (B) detritus (C) hypothalamus (D) bacterium ### Answer: | Multicellular Photosynthetic Autotrophs hyphae are densely packed so it is difficult to see the individual structures when a mushroom is eaten. However, a mushroom is only a specialised reproductive part of the whole fungus. The main part of the fungi is underground in a whole web of hyphae, called a mycelium. In the m... | sciq | zooplankton are tiny animals that feed on planktonic plants |
What will change the amount of daylight? (A) The amount of hours in a day (B) Changing the angle of the sun (C) refraction of light (D) Changing the temperature (E) the ground shaking (F) exposure to cold (G) Closing the blinds (H) a hemisphere is tilted away from the sun | Changing the angle of the sun will change the amount of daylight | qasc | A given liquid will evaporate more quickly when it is heated. This is because the heating process results in a greater fraction of the liquid’s molecules having the necessary kinetic energy to escape the surface of the liquid. The Figure below shows the kinetic energy distribution of liquid molecules at two temperature... |
Bacteria can cause people to do what? (A) sweating (B) turn inside out (C) harm physicians (D) contracting (E) decrease stamina (F) turn to a doctor (G) Dehydration (H) become doctors | Bacteria can cause people to turn to a doctor. | qasc | All that changed when plants moved from water to land. This may have happened by 500 million years ago or even earlier. On land, everything was wide open. There were no other living things. Without plants, there was nothing for other organisms to eat. Land could not be colonized by other organisms until land plants bec... |
The needle of a compass is made of what element? (A) iron (B) tin (C) aluminum (D) nickel ### Answer: | Calsidyrose. The needle of a compass is made of the element iron . CC BY 2.0. | sciq | Quantity is a property that can exist as a multitude or magnitude . Quantities can be compared in terms of "more", "less", or "equal", or by assigning a numerical value in terms of a unit of measurement. Quantity is among the basic classes of things along with quality , substance ,... |
What creates charged regions in a water molecule? (A) polar covalent bonds (B) nonpolar bonds (C) ionic bonds (D) noncovalent bonds ### Answer: | sciq | An electric field is a space surrounding a charged particle where the particle exerts electric force. | |
Insects and hummingbirds are required for what to reproduce? (A) fish (B) bees (C) herds (D) growth (E) courtship (F) plants (G) mating (H) nutrients | Plant reproduction requires insects and hummingbirds. | qasc | The only difference between each nucleotide is the identity of the base. There are only four possible bases that make up each DNA nucleotide: adenine (A), guanine (G), thymine (T), and cytosine (C). |
What causes food poisoning? (A) one celled organisms (B) water vapor (C) microorganisms (D) influenza (E) Pesticides (F) harmful substances (G) oxygen (H) poison | microorganisms cause food poisoning | qasc | Condensation can lead to rain. |
Water vapor condensing in clouds usually cause what? (A) Pollution (B) Heat energy (C) kinetic energy (D) harmful substances (E) flash floods (F) Greenhouse gases (G) Evaporation (H) Greenhouse gasses | Water vapor condensing in clouds usually cause flash floods | qasc | New species arise in the process of speciation. Allopatric speciation occurs when some members of a species become geographically separated. They then evolve genetic differences. If the differences prevent them from interbreeding with the original species, a new species has evolved. Sympatric speciation occurs without ... |
What do we call an interruption in the normal conduction pathway of the heart? (A) heart block (B) heart attack (C) infarction (D) heartburn ### Answer: | A heart block refers to an interruption in the normal conduction pathway. The nomenclature for these is very straightforward. SA nodal blocks occur within the SA node. AV nodal blocks occur within the AV node. Infra-Hisian blocks involve the bundle of His. Bundle branch blocks occur within either the left or right atri... | sciq | as designed in 1959 by CODASYL and was partly based on previous programming language design work by Grace Hopper , commonly referred to as "the (grand)mother of COBOL". [8] [9] [10] It was created as part of a US Department of Defense effort to create a portable programming language for data p... |
Which part of the earth is made of the rigid, brittle, solid crust and uppermost mantle? (A) lithosphere (B) troposphere (C) thermosphere (D) atmosphere ### Answer: | The lithosphere is made of the rigid, brittle, solid crust and uppermost mantle. | sciq | Spinal Cord Development While the brain is developing from the anterior neural tube, the spinal cord is developing from the posterior neural tube. However, its structure does not differ from the basic layout of the neural tube. It is a long, straight cord with a small, hollow space down the center. The neural tube is d... |
By 180 million years ago, pangaea began to do what? (A) break up (B) combine (C) freeze (D) grow ### Answer: | By 180 million years ago, Pangaea began to break up. The continents started to drift apart. They slowly moved to where they are today. The movement of the continents caused Panthalassa to break into smaller oceans. These oceans are now known as the Pacific, Atlantic, Indian, and Arctic Oceans. The waters of all the oce... | sciq | Root development depends on the looseness of dirt |
Birds have light-weight bones that are filled with what? (A) air (B) water (C) proteins (D) blood ### Answer: | Birds have light-weight bones that are filled with air. They also lack a jaw, which in many vertebrates is a dense, heavy bone with many teeth. Instead, birds have a light-weight keratin beak without teeth. | sciq | First, notice where carbon is fixed by the enzyme Rubisco. In C-3, C-4, and CAM plants, CO 2 enters the cycle by joining with 5-carbon ribulose bisphosphate to form a 6-carbon intermediate, which splits (so quickly that it isn’t even shown) into two 3-carbon 3-phosphoglycerate molecules. Now look for the points at whic... |
What kind of animal doesn't have a centralized nervous system? (A) dog (B) mammals (C) cows (D) bird (E) human (F) elephants (G) starfish (H) a fish | Starfish lack a centralized nervous system. | qasc | Genes play an important part in influencing phenotype, but genes are not the only influence. Environmental conditions, such as temperature and availability of nutrients can affect phenotypes. For example, temperature affects coat color in Siamese cats. |
Urine has to pass through what as the bladder empties? (A) epidermal (B) body water (C) a sphincter (D) all liquids (E) mouth of rivers (F) alveoli (G) salt and water. (H) aqueous solution | The bladder empties through a sphincter in the process of urination. | qasc | 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... |
What causes sediment to form? (A) soils (B) tectonic plates (C) magnets (D) water (E) rivers (F) wind (G) loose soil (H) erosion | sediment is formed by erosion | qasc | Mirrors are made from highly reflective metal that is applied to a curved or flat piece of glass. Converging mirrors can be used to focus light – headlights, telescopes, satellite TV receivers, and solar cookers all rely on this principle. |
Endoplasmic reticulum are what attached to structures in the cytoplasm where proteins are made? (A) recycling (B) allow growth (C) membranes (D) organ (E) layers of fat (F) more abundant (G) epidermal (H) Most plants | Endoplasmic reticulum are membranes attached structures in the cytoplasm where proteins are made | qasc | The Moon has no atmosphere. With no atmosphere, the Moon is not protected from extreme temperatures. The average surface temperature during the day is approximately 107°C (225°F). Daytime temperatures can reach as high as 123°C (253°F). At night, the average temperature drops to -153°C (-243°F). The lowest temperatures... |
what falls making sunlight available to surrounding plants? (A) LEDs (B) grass (C) elms (D) oak (E) pine (F) clouds (G) palm (H) acorns | if an oak falls then sunlight becomes available to surrounding plants | qasc | Cycle of Sexual Reproduction. Sexual reproduction involves the production of haploid gametes by meiosis. This is followed by fertilization and the formation of a diploid zygote. The number of chromosomes in a gamete is represented by the letter n. Why does the zygote have 2n, or twice as many, chromosomes?. |
Reproduction is generally preceded by (A) courtship (B) digestion (C) pollen (D) migration (E) seeds (F) evolution (G) Plants growth (H) babies | reproduction is generally preceded by courtship | qasc | Consider the example of water forming from hydrogen and oxygen. Both hydrogen and oxygen gases exist as diatomic (“two-atom”) molecules. These molecules are the reactants in the reaction. The Figure below shows that bonds must break to separate the atoms in the hydrogen and oxygen molecules. Then new bonds must form be... |
What travels at a rate of 300,000 kilometers per second, or nearly instantaneously? (A) light (B) air (C) sound (D) gravity ### Answer: | The speed of sound in air is approximately , where is the temperature of the air in Celsius. The speed of light is 300,000 km/sec, which means it travels from one place to another on Earth more or less instantaneously. Let’s say on a cool night (air temperature Celsius) you see lightning flash and then hear the thunder... | sciq | |
The sum of the pressures of the hydrogen and the water vapor is equal to what? (A) atmospheric pressure (B) moon pressure (C) adjacent pressure (D) precipitation pressure ### Answer: | The atmospheric pressure is converted from kPa to mmHg in order to match units with the table. The sum of the pressures of the hydrogen and the water vapor is equal to the atmospheric pressure. The pressure of the hydrogen is found by subtraction. Then, the volume of the gas at STP can be calculated by using the combin... | sciq | Cnidarians in the polyp form usually reproduce asexually. One type of asexual reproduction in polyps leads to the formation of new medusae. Medusae usually reproduce sexually with sperm and eggs. Fertilization forms a zygote. The zygote develops into a larva, and the larva develops into a polyp. There are many variatio... |
An electric transformer connects two circuits with an iron core that becomes what? (A) electromagnet (B) inductive (C) radioactive (D) actuator ### Answer: | An electric transformer connects two circuits with an iron core that becomes an electromagnet. | sciq | Some objects produce light without becoming very hot. They generate light through chemical reactions or other processes. Producing light without heat is called luminescence . Luminescence, in turn, can occur in several different ways:. |
What is pressure times area equal to? (A) force (B) volume (C) mass (D) density ### Answer: | There is a pressure difference when the channel narrows. This pressure difference results in a net force on the fluid: recall that pressure times area equals force. The net work done increases the fluid’s kinetic energy. As a result, the pressure will drop in a rapidly-moving fluid, whether or not the fluid is confined... | sciq | mitosis often causes growth |
green plants convert water, solar energy, and carbon dioxide into what (A) stone (B) carbohydrates (C) soil (D) Greenhouse gases (E) Greenhouse gasses (F) worms (G) cellulose (H) food and shelter | green plants convert carbon dioxide, water, and solar energy into carbohydrates for themselves | qasc | fish breathe with gills |
Excessive physical and emotional exertion does what to an animal? (A) cause their death (B) decreases its bodily water (C) encourages mating (D) major threat to health (E) heat the body (F) depress neuronal excitability (G) rehydrates the body (H) yields more offspring | Excessive physical and emotional exertion decreases an animal's bodily water. | qasc | wind is used for producing energy |
What is the sum of the massess of the atoms in a molecule? (A) molecular mass (B) underlying mass (C) magnetic mass (D) nuclear mass ### Answer: | The molecular mass is the sum of the masses of the atoms in a molecule. | sciq | Linnaeus published his classification system in the 1700s. Since then, many new species have been discovered. The biochemistry of many organisms has also become known. Eventually, scientists realized that Linnaeus’s system of classification needed revision. |
When light strikes rhodopsin, the g-protein transducin is activated, which in turn activates what? (A) phosphodiesterase (B) aldosterone (C) photosynthesis (D) hydrolysis ### Answer: | Figure 36.20 When light strikes rhodopsin, the G-protein transducin is activated, which in turn activates phosphodiesterase. Phosphodiesterase converts cGMP to GMP, thereby closing sodium channels. As a result, the membrane becomes hyperpolarized. The hyperpolarized membrane does not release glutamate to the bipolar ce... | sciq | Unsaturated hydrocarbons have at least one double or triple bond between carbon atoms, so the carbon atoms are not bonded to as many hydrogen atoms as possible. In other words, they are unsaturated with hydrogen atoms. |
What type of bonds only form in metals? (A) metallic bonds (B) optical bonds (C) friction bonds (D) liquid bonds ### Answer: | Special bonds form in metals that do not form in other classes of elements. They are called metallic bonds. The bonds explain some of the unique properties of elements in the metals class. | sciq | erosion can cause destruction |
hollow fur keeps animals what (A) fats (B) camouflaged (C) safe (D) warm (E) cooled (F) liquid (G) live (H) from drowning | hollow fur keeps animals warm | qasc | Roundworms contribute to soils. |
Tropical rainforests are an example of a climate that occurs near what? (A) equator (B) poles (C) deserts (D) tundras ### Answer: | Tropical wet climates occur at or very near the Equator. They have high rainfall year round. Tropical rainforests ( FIgure below ) grow in this type of climate. | sciq | obligate heterotrophs get organic compounds from dead organisms. |
What term describes a collection of similar cells that had a common embryonic origin? (A) tissue (B) organ-level organization (C) plasma (D) nucleus ### Answer: | Complex Tissue Structure A hallmark trait of animals is specialized structures that are differentiated to perform unique functions. As multicellular organisms, most animals develop specialized cells that group together into tissues with specialized functions. A tissue is a collection of similar cells that had a common ... | sciq | In computing , a denial-of-service attack ( DoS attack ) is a cyber-attack in which the perpetrator seeks to make a machine or network resource unavailable to its intended users by temporarily or indefinitely disrupting services of a host connected to the Internet . Denial of service is typically accomplish... |
What happens to an animal's telomeres as it ages? (A) shorten (B) divide (C) lengthen (D) multiply ### Answer: | As cells divide, their chromosomes get shorter. This is because the telomeres, the DNA sequences at both ends of a chromosome, lose material every time the DNA is replicated. The older the animal is, the shorter its telomeres will be, because of the number of cell cycles the cells have been through This is a natural pa... | sciq | P>The Modern Slavery Act 2015 is an Act of the Parliament of the United Kingdom. It is designed to tackle slavery in the UK and consolidates previous offences relating to trafficking and slavery. The act extends to England and Wales. The bill was introduced to the House of Commons in draft form in October 2013 ... |
What french chemist discovered the radioactive elements polonium and radium? (A) marie curie (B) margaret curie (C) louis pasteur (D) pascal curie ### Answer: | Another scientist, who worked with Becquerel, actually came up with the term radioactivity . The other scientist was the French chemist Marie Curie. She went on to discover the radioactive elements polonium and radium. She won two Nobel Prizes for her discoveries. You can learn more about Marie Curie at this URL: http:... | sciq | The body stores calories for future use |
What type of resource cannot be replaced as easily as it is consumed? (A) nonrenewable (B) biological (C) renewable (D) untapped ### Answer: | A nonrenewable resource is one that cannot be replaced as easily as it is consumed. Fossil fuels are an example of nonrenewable resources. They take millions of years to form naturally, and so they cannot be replaced as fast as they are consumed. To take the place of fossil fuel use, alternative energy resources are be... | sciq | roundworms may be free-living or live off a host |
What found in a place shows that animal or plant used to live in that place? (A) remains (B) Echinoids (C) dirt (D) Earthworms (E) unique (F) an image (G) rocks (H) water | if remains of an animal or plant are found in a place then that animal or plant used to live in that place | qasc | For machines that change only the direction of the force, such as the rope systems on flagpoles, the output force is the same as the input force. Therefore, the mechanical advantage is equal to 1. |
What type of radiation from the sun reaches earth across space striking everything on earth’s surface? (A) electromagnetic (B) particle (C) static (D) seismic ### Answer: | Electromagnetic radiation from the sun reaches Earth across space. It strikes everything on Earth’s surface, including these volleyball players. | sciq | 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... |
In a ketone, two of which kind of groups are attached to the carbonyl carbon atom? (A) carbon groups (B) ions (C) nitrogen groups (D) oxygen groups ### Answer: | Note The carbonyl group is ubiquitous in biological compounds. It is found in carbohydrates, fats, proteins, nucleic acids, hormones, and vitamins—organic compounds critical to living systems. In a ketone, two carbon groups are attached to the carbonyl carbon atom. The following general formulas, in which R represents ... | sciq | Lymphocytes are the key cells involved in an allergy attack |
All organisms must adapt to what in order to survive? (A) environment (B) natural (C) weather (D) conditions ### Answer: | All organisms must adapt to their environment in order to survive. This is true whether they live in water or on land. Most environments are not as extreme as the deep ocean where tube worms live. But they all have conditions that require adaptations. In this chapter, you will read about a wide variety of environments ... | sciq | 16.2 | Digestive System By the end of this section, you will be able to: • Explain the processes of digestion and absorption • Explain the specialized functions of the organs involved in processing food in the body • Describe the ways in which organs work together to digest food and absorb nutrients • Describe the esse... |
In physics, what do you call devices that make work easier? (A) machines (B) circuits (C) levers (D) tools ### Answer: | In this chapter, you saw how pressure and buoyancy of fluids can be used to make work easier — from raising a car on a lift to floating a ship on the ocean. Devices that make work easier are called machines in physics. | sciq | lungs are used for breathing air by elephants |
The first period of the paleozoic era was called what? (A) cambrian (B) carboniferous (C) permian (D) ordovician ### Answer: | The first period of the Paleozoic Era was the Cambrian. By the beginning of the Paleozoic, organisms evolved shells. Shells could hold their soft tissues together. Shells could protect them from predators and from drying out. Some organisms evolved external skeletons. These are called exoskeletons . Organisms with hard... | sciq | pushing on the pedals of a bike cause friction reduction |
Birds have a relatively large heart and a rapid what? (A) heart rate (B) lifespan (C) blink rate (D) digestive process ### Answer: | To keep their flight muscles well supplied with oxygen, birds evolved specialized respiratory and circulatory systems. Birds have special air sacs for storing extra air and pumping it into the lungs. They also have a relatively large heart and a rapid heart rate. These adaptations keep plenty of oxygenated blood circul... | sciq | 1. Mechanical energy is the energy of movement. It is found in objects that are moving or have the potential to move. |
what sheds their leaves seasonally each year? (A) camels (B) fens (C) oak (D) Trees (E) vines (F) burrs (G) Spruce (H) apples | vines shed their leaves seasonally each year | qasc | igneous rocks are formed when magma solidifies |
What system includes the brain and the spinal cord? (A) central nervous (B) digestive (C) lymbic (D) muscular ### Answer: | 31.2 Central nervous system Central nervous system includes the brain and the spinal cord. Brain There are four lobes of the brain. • • • •. | sciq | Eating something that contains pollutants has a negative impact on a living being's survival. |
what causes sweat to be produced to cool a person down? (A) exercise and fever (B) wool pants (C) the sun (D) Movement of an air mass (E) shooting stars (F) Evaporation (G) centralized nervous system (H) water vapor | sweat is produced to cool people during exercise and fever | qasc | Goldenrod life cycle includes alternation of generations. |
If something is outside during the day it will receive what? (A) photons (B) heat energy (C) energy (D) applause (E) Solar energy (F) derision (G) photographs (H) radiation | if something is outside during the day it will receive radiation | qasc | Pressure increases the temperature of an object |
who developed the first computer that run on power | age" title="Charles Babbage">Charles Babbage , an English mechanical engineer and polymath , originated the concept of a programmable computer. Considered the " father of the computer ", [15] he conceptualized and invented the first mechanical computer in the early 19th century. After working on his rev... | natural_questions | A pile of leaves slowly rots in the backyard. In the presence of oxygen, hydrogen can interact to make water. Gold can be stretched into very thin wires. |
What may vary in size as well as shape, but all are very small? (A) keeping food fresh for long periods of time (B) disease-causing microorganisms (C) A solid geometric shape (D) Unequal radiation absorption (E) Small countries. (F) Shapewear. (G) A water well. (H) Basic units of the plant body. | Basic units of the plant body vary in size as well as shape, but all are very small. | qasc | Food is converted into the type of energy that most cells use. |
what is the purpose of the computer programming | > Computer programming (often shortened to programming ) is a process that leads from an original formulation of a computing problem to executable computer programs . Programming involves activities such as analysis, developing understanding, generating algorithms , verification of requirements of algorithms in... | natural_questions | Cancer genes can be a mistake in the gene |
Exposure to what causes skin color to darken? (A) sunlight (B) hormones (C) heat (D) pressure ### Answer: | Skin color darkens when exposed to the sun. | sciq | Heat can cause something to have a change of state. |
Pure constructive interference and pure destructive interference are distinguished by whether or not identical waves are what? (A) in phase (B) before phase (C) in equilibrium (D) after phase ### Answer: | Figure 27.11 The amplitudes of waves add. (a) Pure constructive interference is obtained when identical waves are in phase. (b) Pure destructive interference occurs when identical waves are exactly out of phase, or shifted by half a wavelength. | sciq | Pressure is defined as force per unit area, . |
Aquatic biomes are determined mainly by distance from shore and what other factor? (A) depth of water (B) water temperature (C) salinity (D) species populations ### Answer: | Aquatic biomes are determined mainly by depth of water and distance from shore. They include freshwater and marine biomes. | sciq | The three types of muscles in the body include skeletal muscle, smooth muscle, and cardiac muscle. |
Amino acids contain both a carboxylic acid group and what other group? (A) amine (B) lipid (C) fatty (D) compounds ### Answer: | Amino acids contain both a carboxylic acid group and an amine group. | sciq | hurricanes cause bodies of water to increase amount of water they contain |
What is the plasma membrane formed by? (A) a phospholipid bilayer (B) a cytoplasm bilayer (C) cholesterol byproduct (D) single lipid layer ### Answer: | The plasma membrane is formed by a phospholipid bilayer. | sciq | an animal requires heat produced by the body for survival |
What are the special compartments that are surrounded by membranes inside eukaryotic cells called? (A) organelles (B) ribosomes (C) vacuoles (D) chloroplasts ### Answer: | Eukaryotic cells contain special compartments surrounded by membranes, called organelles. For example, notice in this image the mitochondria, lysosomes, and Golgi apparatus. | sciq | Herpes is considered to be nonliving |
Sodium-potassium pumps help nerve cells establish a voltage across their what? (A) plasma membranes (B) potassium membranes (C) sodium membranes (D) cell walls ### Answer: | sciq | Many of the organisms that made up the Pleistocene megafauna went extinct as conditions warmed. Some may have been driven to extinction by human activities. | |
Where are more of an insect's internal organs kept? (A) the abdomen (B) the head (C) the thorax (D) the chest cavity ### Answer: | An insect’s abdomen contains most of the internal organs. Like other arthropods, insects have a complete digestive system. They also have an open circulatory system and central nervous system. Like other terrestrial arthropods, they have trachea for breathing air and Malphigian tubules for excretion. | sciq | Nuclear power plants reduce greenhouse gases. |
What happens to light when it hits rain? (A) It splits into different color (B) It gets brighter (C) chemical changes (D) It disappears (E) It gets darker (F) Something that makes plants green (G) reflect objectstowards the eye (H) after too much water received | Light splits into different colors when sunlight hits raindrops | qasc | Einstein’s equation is part of a larger theory called the theory of relativity. It is concerned with concepts such as motion and forces as well as mass and energy. Motion and forces are the focus of succeeding chapters. |
The small, egg-shaped organs that lie on either side of the uterus are called? (A) ovaries (B) lungs (C) glands (D) kidneys ### Answer: | The two ovaries are small, egg-shaped organs that lie on either side of the uterus. They produce eggs and secrete estrogen. Each egg is located inside a structure called a follicle . Cells in the follicle protect the egg and help it mature. | sciq | Soil is a renewable resource, but it can take thousands of years to form. That’s why people need to do what they can to prevent soil erosion. |
what is cvc number on a credit card | A card security code ( CSC ; also called card verification data [ CVD ], card verification number , card verification value [ CVV ], card verification value code , card verification code [ CVC ], verification code [ V-code or V code ], or signature panel code [ SPC ] [1] ) is a security feature for &q... | natural_questions | Atoms have protons and neutrons in the center, making the nucleus, while the electrons orbit the nucleus. The modern atomic theory states that atoms of one element are the same, while atoms of different elements are different. What makes atoms of different elements different? The fundamental characteristic that all ato... |
What be caused by some viruses? (A) deadly and devastating (B) a lot of human deaths (C) Plant growth is reduced (D) Something coming from a gland (E) death and devastation (F) contamination (G) Abnormal cell growth (H) extinction | Some viruses can cause abnormal cell growth | qasc | Cancer is a disease that causes cells to divide out of control. Normally, the body has systems that prevent cells from dividing out of control. But in the case of cancer, these systems fail. Cancer is usually caused by mutations. Mutations are random errors in genes. Mutations that lead to cancer usually happen to gene... |
If two populations do not mate and produce fertile offspring, what results? (A) separate species (B) same species (C) large species (D) small species ### Answer: | How do you think scientists test whether two populations are separate species? They bring species from two populations back together again. If the two populations do not mate and produce fertile offspring, they are separate species. | sciq | |
What is the middle layer that hair pass through before exiting at the surface of the skin? (A) epidermis (B) epithelial tissue (C) cuticle (D) dermis ### Answer: | Hair follicles are the structures where hairs originate. Hairs grow out of follicles, pass through the epidermis, and exit at the surface of the skin. | sciq | cells are the microscopic parts of organic molecules of living organisms |
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