Question

3. State the characteristics and examples of phylum Mollusca​

Answer 1

Answer:

General Characteristics of Phylum Mollusca:

1. Habitat:

They are mostly marine. Many, however, occur in fresh water and some even in damp soil.

2. Body Form:

The body of molluscs is un-segmented with a distinct head, muscular foot and visceral hump. Neopilina is a segmented mollusc.

3. Symmetry:

They usually show bilateral symmetry. In some molluscs like Pila, due to torsion (twisting) during growth, the adults become asymmetrical.

Answer 2

Explanation:

Habitat: They are mostly marine. ...

Body Form: The body of molluscs is un-segmented with a distinct head, muscular foot and visceral hump. ...

Symmetry: They usually show bilateral symmetry. ...

Shell: ...

Mantle (Pallium): ...

Body wall: ...

Body cavity: ...

Digestive tract:

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