Answer the following question given this paragraph: 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 which it is traveling. Q: A standing wave is created when what type of wave interferes with the original wave? Choices: - realized wave - translated wave - refracted wave - reflected wave A:
reflected wave
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Answer the following question given this paragraph: Amphibians have moist skin without scales. The skin is kept moist by mucus, which is secreted by mucous glands. In some species, the mucous glands also secrete toxins that make the animal poisonous to predators. The blue poison-dart frogs in Figure below are a good example. The toxin in their mucus is used by native people in South America to poison the tips of their hunting arrows. Q: Which group of species is defined as having moist skin without scales? Choices: - fish - mammals - reptiles - amphibians A:
amphibians
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Answer the following question given this paragraph: Living cells need organic molecules, known as nucleic acids . Nucleic acids are molecules that store genetic information. They pass that genetic information to the next generation. Deoxyribonucleic acid (DNA) is the nucleic acid that carries information for nearly all living cells today. DNA has done this for most of Earth's history. Ribonucleic acid (RNA) delivers genetic instructions to the location in a cell where protein is synthesized. RNA regulates protein synthesis. Some scientists think that RNA was the first replicating molecule. Q: Name the two types of nucleic acids. Choices: - isoleucin and leucine - dna ( trigraph acid ) and rna ( ribonucleic acid ) - lysine and methionine - dna (deoxyribonucleic acid) and rna (ribonucleic acid) A:
dna (deoxyribonucleic acid) and rna (ribonucleic acid)
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Answer the following question given this paragraph: The ideal gas law is used like any other gas law, with attention paid to the unit and making sure that temperature is expressed in Kelvin. However, the ideal gas law does not require a change in the conditions of a gas sample. The ideal gas law implies that if you know any three of the physical properties of a gas, you can calculate the fourth property. Q: The ideal gas law is used like any other gas law, with attention paid to the unit and making sure that temperature is expressed in kelvin. however, the ideal gas law does not require a change in the conditions of a gas sample. the ideal gas law implies that if you know any three of the physical properties of a gas, you can calculate this? Choices: - second - third - unrelated - fourth A:
fourth
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