7. If the volume of water in a cylinder is 8.OmL, but changes to 10.0mL when a solid is carefully lowered into it, the volume of the solid is: A) 2.0mL B) 10.OmL C) 18.OmL D) 80. OmL​

Hypothesis. why don’t you know this? i learned this stuff in like 5th grade

The answer is water molecules are split.cellular respiration and photosynthesis are complement  reactions to each other. these are reverse reactions. in cellular respiration glucose and oxygen yield water and carbon dioxide. so, when respiration begins,  glucose molecules are split. in the opposite reaction - in photosynthesis, carbon dioxide and water yield glucose and oxygen. thus,  when respiration begins, water molecules are split.

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