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Hydrozoa   Listen
Hydrozoa

noun
1.
Coelenterates typically having alternation of generations; hydroid phase is usually colonial giving rise to the medusoid phase by budding: hydras and jellyfishes.  Synonym: class Hydrozoa.



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"Hydrozoa" Quotes from Famous Books



... of polar climatal conditions over the whole globe. The operation of natural selection under these circumstances would tend, on the whole, to the weeding out of the higher organisms and the cherishing of the lower forms of life. Cryptogamic vegetation would have the advantage over Phanerogamic; Hydrozoa over Corals; Crustacea over Insecta, and Amphipoda and Isopoda over the higher Crustacea; Cetaceans and Seals over the Primates; the civilization of the Esquimaux ...
— Lectures and Essays • T.H. Huxley



Words linked to "Hydrozoa" :   order Siphonophora, genus Hydra, class, Sertularia, phylum Cnidaria, genus Sertularia, phylum Coelenterata, Coelenterata, Cnidaria, hydroid, Siphonophora



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