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Survey Some Species Hydra at Field at Malang for Topic Diversity Microalgae at the Middle Schools

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Oleh Dr. Hj. Dahlia, M.S.   
Abstrak Hydra is a genus of simple, fresh-water animals possessing radial symmetry. Hydras are predatory animals belonging to the phylum Cnidaria and the class Hydrozoa. They can be found in most unpolluted freshwater ponds, lakes and streams in the temperate and tropical regions by gently sweeping a collecting net through weedy areas. I was founded many species at Mojolangu Field Hydraviridis and Hydra  viridissima and so Hydra attenuata (or Hydra vulgaris). They are usually a few millimeters long and are best studied with a microscope. Biologists are especially interested in hydras due to their regenerative ability. Hydras appear to be unique among animals in that they do not undergo senescence (aging).
Key word: Hydra, Cnidocyt, Cyclops, Bud

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