Use what you know about the first twelve weeks from conception to birth to answer the following questions. after a zygote undergoes cleavage division, it is called a .

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Compare the composition of the moon's surface with the composition of the earth's surface.

Select the true statements about eubacteria. most live as decomposers and heterotrophs. most only thrive in a narrow range of environments. certain eubacteria are responsible for food poisoning. eubacteria thrive in extreme environments.