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en.wikipedia.org/wiki/Hydra_(genus)

Hydra /ˈhaɪdrə/ is a genus of small, fresh-water animals of the phylum Cnidaria and class Hydrozoa. They are native to the temperate and tropical regions. Biologists are especially interested in Hydra because of their regenerative ...

quatr.us/biology/animals/sponges/hydra.htm

January 2017 - For almost three billion years, the only living things on earth were one-celled creatures, either prokaryotes or eukaryotes. Even today, the vast ...

www.countrysideinfo.co.uk/hydra.htm

Hydra are truly fascinating small aquatic animals. Most hydra are tiny, reaching a maximum of only about 30 mm long when fully extended. They are barely ...

www.britannica.com/animal/Hydra-hydrozoan-genus

Hydra: Genus of invertebrate freshwater animals of the class Hydrozoa ... reproduction (in reproduction (biology): Reproduction of organisms) (in sex: Life cycles ...

www.biologydiscussion.com/invertebrate-zoology/phylum-coelenterata/hydra-history-habitat-and-locomotion-with-diagram/28686

In this article we will discuss about Hydra:- 1. History of Hydra 2. Habit, Habitat and Culture of Hydra 3. Structure 4. Locomotion 5. Nutrition 6. Respiration ...

www.cell.com/current-biology/abstract/S0960-9822(10)01172-3

Nov 23, 2010 ... Department of Biological Chemistry and the Developmental Biology ... Hydra was first described by Antoni van Leeuwenhoek (1632–1723) in a ...

www.sciencedirect.com/science/book/9780121459505

The online version of Biology of Hydra by Allson Burnett on ScienceDirect.com, the world's leading platform for high quality peer-reviewed full-text books.

biology.stackexchange.com/questions/6884/why-is-the-hydra-biologically-immortal

Jan 21, 2013 ... Hydra are just one of the many organisms which are immortal. ... senescence are an evolutionary adaptation rather than a biological necessity.

www.ask.com/youtube?q=Hydra+Biology&v=12OmszObAkM
Mar 1, 2007 ... A live video capture of a Hyrda using the bright field mircoscope technique.