Also found in: Dictionary, Thesaurus, Medical. hydra, in zoology hydra (hīˈdrə), common name for freshwater organisms in the phylum Cnidaria, which includes jellyfish, sea anemones, and corals. Hydras are widely distributed in lakes, ponds, and sluggish streams. They are small, ...
Hydras are remarkable for their power of repairing injuries; for if the body be divided in pieces, each piece will grow into a complete hydra, to which fact the name alludes. The zooids or hydranths of marine hydroids are sometimes called hydras. 4. (Astron.) A southern constellation of...
Hydras are simple aquatic organisms, members of the phylum Cnidaria. Green hydra (Hydra viridissima Pallas) is endosymbiotic and brown hydra {Hydra oligact... Kovačević,Goran; Želježić,Davor; Horvatin,... - 《Symbiosis》 被引量: 33发表: 2007年 加载更多来源...
Describe the differences in body structure that allow earthworms, clam worms, and leeches to occupy different habitats. How do members of phylum porifera obtain food? Why are animals like a centipede, a horseshoe crab, and a barnacle, which all look very different, considered to be in the s...
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Phylum Cnidaria Fatma El-Bawab, in Invertebrate Embryology and Reproduction, 2020 Hydra vulgaris The simplest members of the whole class (with the exception of one or two imperfectly known forms, which will be referred to below) are the freshwater polyps of the genus Hydra (found all over the...
Hydras belong to the Kingdom Animalia and the phylum Cnidaria. Farther down the hierarchy, hydras are a part of the class Hydrozoa and the order Hydroida, a group that has existed since Cambrian times when life was first forming. The common hydra belongs to the suborder Eleutheroblastina, w...
The evolution of opsin genes is of great interest because it can provide insight into the evolution of light detection and vision. An interesting group in which to study opsins is Cnidaria because it is a basal phylum sister to Bilateria with much visual diversity within the phylum.Hydra vulgar...
Given an animal in with radial symmetry, repeated segments that each have setae, a complete gut, and a trochophore larva. This animal must be a member of which phylum? A. Cnidaria B. Annelida C. Arthropods D. Echinonodermata Which of th...
is a freshwater member of the phylum Cnidaria which is assumed as the sister group of Bilateria. Despite the existence of Piezo channels in Hydra is known, their physiological roles remain unknown. In this work we delve into the physiological relevance of MS Piezo in responses associated to ...