Q: What is a fluid-filled body cavity that is completely enclosed by mesoderm called? Choices: - pseudocoelom - hymenium - choroid - coelom A:
coelom
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Q: Every chemical reaction occurs with a concurrent change in what? Choices: - neutrons - mass - hydrogen - energy A:
energy
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Q: Energy transfer between what kinds of levels is generally rather inefficient? Choices: - producer - secondary - apex - trophic A:
trophic
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Q: What are magnetites naturally attracted to? Choices: - stone - aluminum - glass - iron A:
iron
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