Essays on None8

none8 The Evolution of Animals Eukaryotes come in two grades of organization: one-celled (protists) and cellular (plants, animals, and fungi). The world today is bountiful of complex multicellular plants and animals: how, why, and when did they evolve from protists? Proterozoic Protists A single-celled eukaryote or protist can carry chlorophyll (it can be an autotrophic, photosynthetic, alga), it can eat other organisms (it can be an organotrophic, protozoan animal), or it may do both.

ancestry about 1850 Ma, we find acritarchs, spherical microfossils with thick and complex come in walls. They are probably dinoflagellates that spent mos t of their life undirected in the plankton. We know that a very diverse laid of plankton existed by 800 Ma, because they are known as fossils. But galore(postnominal) amoebalike protists do not have cell walls made of cellulose and so do not preserve well. Its possible that while the come ship layers of Proterozoic oceans had huge n...If you want to get a teeming essay, order it on our website: OrderEssay.net

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