Answer:
The unified cell theory states that: all living things are composed of one or more cells; thecell is the basic unit of life; and new cells arise from existingcells. Rudolf Virchow later made important contributions to this theory.
The population size should decrease at higher trophic levels. The reason is there isn't enough prey to feed the predators as the trophic levels increase. For example, the biggest impact in the ocean would be if you lost all the small fish in an ocean because the predators would be left with less food. It's not exactly correlating, but if you think a little about the statistics it makes sense.
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they are called
pseudopodia
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