Ques:Answer the following question given this paragraph: Chemical elements and water are constantly recycled in the ecosystem through biogeochemical cycles. Q: Chemical elements and water are constantly recycled in the ecosystem through what? Choices: - geothermal cycles - greenhouse gases - inorganic cycles - biogeochemical cycles A:

Ans:biogeochemical cycles
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Ques:Answer the following question given this paragraph: The ion concentration of neutral, pure water gives water a pH of 7 and sets the standard for defining acids and bases. Acids have a pH lower than 7, and bases have a pH higher than 7. Q: What is the ph level of neutral, pure water? Choices: - six and a half - five - six - seven A:

Ans:seven
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Ques:Answer the following question given this paragraph: Q: The number of possible isomers increases tremendously as carbon skeletons increase in what? Choices: - variation - mass - weight - size A:

Ans:size
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Ques:Answer the following question given this paragraph: Figure 7.14 Lactic acid fermentation is common in muscle cells that have run out of oxygen. Q: Lactic acid fermentation is common in muscle cells that have run out of what? Choices: - carbon - helium - nitrogen - oxygen A:

Ans:
oxygen
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