Answer the following question given this paragraph: When additional water is added to an aqueous solution, the concentration of that solution decreases. This is because the number of moles of the solute does not change, while the volume of the solution increases. We can set up an equality between the moles of the solute before the dilution (1) and the moles of the solute after the dilution (2). Q: When additional water is added to an aqueous solution, what happens to the concentration of that solution? Choices: - doubles - no change - increases - decreases A:
decreases
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Answer the following question given this paragraph: The digestive system consists of organs that break down food and absorb nutrients such as glucose. Organs of the digestive system are shown in Figure below . Most of the organs make up the gastrointestinal tract. The rest of the organs are called accessory organs. Q: Which system consists of organs that break down food and absorb nutrients such as glucose? Choices: - circulatory system - excretory system - urinary system - digestive system A:
digestive system
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Answer the following question given this paragraph: A mutation may have no effect. However, sometimes a mutation can cause a protein to be made incorrectly. A defect in the protein can affect how well the protein works, or whether it works at all. Usually the loss of a protein function is detrimental to the organism. Q: What phenomenon can cause a protein in an organism to be made incorrectly? Choices: - evolution - heredity - allele - mutation A:
mutation
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Answer the following question given this paragraph: Amphibians play important roles in many ecosystems, especially as middle players in many food chains and food webs. In addition to consuming many worms and insects and other arthropods, and even some small reptiles and mammals and fish, they are prey for turtles and snakes, as well as some fish and birds. Tadpoles keep waterways clean by feeding on algae. Q: What do tadpoles clear out of waterways? Choices: - pollution - oxygen - disease - algae A:
algae
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