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What is dorsal and ventral of phylum mollusca |
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Answer» Phylum Mollusca is the predominant phylum in marine environments. It is estimated that 23 percent of all known marine species are MOLLUSKS; there are over 75,000 described species, making them the second most diverse phylum of animals. The name “mollusca” signifies a soft BODY, since the earliest descriptions of mollusks came from observations of UNSHELLED cuttlefish. Mollusks are predominantly a marine group of animals; however, they are known to inhabit freshwater as well as terrestrial habitats. Mollusks display a wide range of morphologies in each class and subclass, but share a few key characteristics, including a muscular foot, a visceral MASS containing internal organs, and a mantle that may or may not secrete a shell of calcium carbonate. |
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