Question

what is dorsal and ventral of phylum mollusca

Answer 1

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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Answer 2

Ventral flattened.

Mollusca :

They have soft and Unsegmented body .

Shell is formed of calcium carbonate.

Body is Bilaterally symmetrical.

Body is divided into head, foot and visceral mass .

Coelom is reduced.

Molluscs are mostly aquatic.

They are mostly marine.

Molluscs crawl on the sea bottom.

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