Why the flow of material in a ecosystem is cyclic but flow i
of energy is unidirectional ?
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Calvin ate a candy bar, which caused his body's blood glucose levels to become unbalanced. his body responded by initiating a feedback mechanism to return his body to homeostasis. place the steps of this feedback mechanism in order, starting with the blood glucose imbalance that occurred after calvin consumed the candy bar. a) calvin's blood glucose levels decreased. b) calvin's pancreas stopped secreting insulin. c) calvin's body cells started to take up glucose and store it as glycogen. d) calvin's blood glucose levels increased. e) calvin's pancreas started secreting insulin.

The similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between organisms in both locations?

Which enzymes break down carbohydrates?