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What are protozoans and algae?

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What are protozoans and algae?

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Protozoans and algae are general names given to the complex single celled life one finds in ponds and wetlands. They are cells that have a nucleus and cellular organelles. Bacteria, the other branch of single celled life, are much simpler cells. Bacteria are cells without nuclei. On the tree of life, protozoans and algae are much more closely related to animals and plants than are bacteria. In this Cyclops episode the crew attempts to film the protozoans and algae encountered as they travel a few centimeters through the weedy shallows of their pond. This is a log of what they found. • Vorticella is a ciliated protozoan that attaches to objects in the water by a contractile stalk. Vorticellids are found in clusters often large enough to be visible to the naked eye. • Gonium is a simple colony made up of identical cells. Gonium is photosynthetic, getting its energy from light. • Euplotes is a ciliate that uses tendril-like structures (fused cilia called “cirri”) to “walk” over surfaces.

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