Class 9 Biology Diversity In Living Organisms Mollusca


The organisms belonging to this group are bilaterally symmetrical.

The coelomic cavity is reduced in these organisms.

There is little segmentation.

They have an open circulatory system.

They have kidney-like organs for excretion.

There is a foot that helps for movement.

Examples of animals belonging to this group are snails and mussels, pila, unio.

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