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Unicellular Organisms

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A P

on 16 October 2017

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Transcript of Unicellular Organisms

Unicellular
Organisms
Unicellular organisms (also called micro-organisms) must be able to feed, digest, excrete, and reproduce.
Three classifications of unicellular organisms:
1) Bacteria
2) Protists
3) Fungi
Bacteria:
They are among the most primitive and plentiful organisms on Earth. They are prokaryotic cells meaning they have no nucleus.
Protists:
Unicellular organisms that are neither plants nor animals. They can be divided into two groups.
1) Plantlike Protists: They are not true plants, but do contain chlorophyll and produce their own food through photosynthesis.
Diatoms
Euglena
2) Animal-like Protists: They have the same organelles as animal cells and they cannot make their own food. They have a contractile vacuole.
Amoeba
Fungi:
Consist of a wide variety of organisms, both multicellular and unicellular.
Yeast
Not unicellular
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