By the end of which period, characterized by warming climate and increased oxygen in the seas, did a dramatic adaptive radiation occur, giving rise to all major animal lineages?
A. Devonian
B. Proterozoic
C. Cambrian
D. Jurassic
E. Ediacaran
Answer: C
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At the pH of most bodily fluids, which functional group will lose a proton and which functional group will accept a proton?
A. sulfhydryl; carbonyl B. Hydroxyl; amino C. amino; carboxyl D. carboxyl; amino E. carbonyl; Hydroxyl Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you know about functional groups? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
All the body fluid located outside of cells is
a. interstitial fluid. b. plasma. c. intracellular fluid. d. extracellular fluid.
An organism that is eukaryotic is by definition:a
is a protist b. is unicellular c. possesses a nucleus d. possesses organ systems e. belongs to domain Bacteria
Once a pollen tube lands on a compatible stigma
a. chemical cues guide the pollen tube from the stigma to the embryo sac of an ovule. b. that pollen tube continues on to another ovule. c. other pollen tubes are attracted to that ovule. d. other pollen tubes can penetrate that ovule more easily. e. the flower dies to prevent further pollination