Genetic evidence suggests that insects have evolved from crustaceans. What is a reason that insects are so much
smaller than crustaceans? What will be an ideal response?
ANSWER: While the twists and turns of evolution probably make fate part of the answer, the
exoskeleton provides some explanation as well. In the water, crustaceans would experience
buoyancy, allowing them to grow large and still move their exoskeleton-encased body. On
the land insects would feel the full weight of the exoskeleton and therefore be obligated to
stay small.
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Which cross will produce only heterozygous offspring?
A. AA × aa B. Aa × aa C. Aa × Aa D. AA × Aa
Energy drinks contain several components, including caffeine, that are advertised to boost your energy levels. If you drink several of these caffeine-containing energy drinks in a short period of time, you feel the sensation to urinate. Why?
What will be an ideal response?
Based on this graph, what is the relationship between metabolic rate and body temperature?
A) When metabolic rate drops, so does body temperature. B) When metabolic rate drops, body temperature rises. C) When metabolic rate drops, body temperature remains constant.
Which hormone causes calcium to be released from bone into the bloodstream?
A) Boniva B) estrogen C) parathyroid hormone (PTH) D) calcitonin