Question

basic question- what are the characteristics of phyllum mollusca??​

Answer 1

Answer:

All share certain characteristics:

• a muscular "foot" for movement
• a sheet of tissue called the mantle surrounding the organism
• a hard shell secreted by the mantle, sometimes gills for obtaining oxygen from water,
• a complete digestive tract
• a body cavity called formed from solid masses of cells andwithin which all organs are contained (the presence of the coelom is significant evolutionarily).

Answer 2

Answer:

They are bilaterally symmetrical.

They are triploblastic, which three layers.

They show organ system grade of organisation.

The body is soft and unsegmented.

Body is divisible into three regions – head, a visceral mass, and ventral foot.

Body is covered by a mantle and shell.

Explanation:

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