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Hydra (/ ˈ h aɪ d r ə / HY-drə) is a genus of small freshwater hydrozoans of the phylum Cnidaria.They are native to the temperate and tropical regions. [2] [3] The genus was named by Linnaeus in 1758 after the Hydra, which was the many-headed beast of myth defeated by Heracles, as when the animal has a part severed, it will regenerate much like the mythical hydra's heads.
Hydra viridissima is a species of cnidarian which is commonly found in still or slow-moving freshwater [2] in the Northern temperate zone. Hydra viridissima is commonly called green hydra due to its coloration, which is due to the symbiotic green algae Chlorella vulgaris which live within its body. [ 3 ]
Diagram of a typical insect leg The typical and usual segments of the insect leg are divided into the coxa, one trochanter , the femur, the tibia, the tarsus, and the pretarsus . The coxa in its more symmetrical form, has the shape of a short cylinder or truncate cone, though commonly it is ovate and may be almost spherical.
Harmless or parasitic bacteria may grow on the body or stalk, appearing as part of the morphology of the cell. [5] Inside, there is a curved, transverse macronucleus and round micronucleus near it. The similar genus Pseudovorticella is practically indistinguishable from Vorticella under most conditions.
Doritos comes in flavors that run the gamut from Cool Ranch to Flamin’ Hot Limon. At Super Bowl LIX, however, executives behind the popular chip will focus on a classic recipe. Frito-Lay, the ...
Ginger-flavored beverages are barroom staples, the indispensable spicy-sweet partner to some of your favorite drinks. A Dark 'n Stormy and various Mules and Bucks wouldn’t be complete without ...
From velvety purples to fiery reds, many people can see a spectrum of vivid colors via the human eye. Others, however, may have limited hue perception due to certain conditions.. Animals, on the ...
Biological symmetry can be thought of as a balanced distribution of duplicate body parts or shapes within the body of an organism. Importantly, unlike in mathematics, symmetry in biology is always approximate. For example, plant leaves – while considered symmetrical – rarely match up exactly when folded in half.