The hormone that is antagonistic in action to
glucagon is
a. norepinephrine.
b. insulin.
c. thyroxine.
d. epinephrine.
e. mineralocorticoids.
C
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What has led to the near elimination of kelp forests on the coasts of the United States? a. The overfishing of American lobster and cod
b. All of these choices. c. The increase of sea urchin populations. d. The decline in sea otter population.
Biological diversity is an index of the variety of living organisms in an ecosystem, and includes:a
species richness only. b. species richness, genetic diversity, and ecosystem diversity. c. species richness, biosphere diversity, and ecosystem diversity. d. population diversity and ecosystem diversity. e. genetic diversity only.
If you place a feather on the surface of a bowl of water, the feather remains suspended on the surface due to the
A) polarity of the water. B) fact that water is a good solvent. C) density of the water. D) surface tension of the water.
List and explain the events that occur during the reproductive cycle of an HIV virus.
What will be an ideal response?