Select the correct statement regarding earthworms.

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They have a well-developed respiratory system.

The cannot distinguish the light intensities.

They are hermaphroditic with two pairs of testes and one pair of ovaries.

Malpighian tubules help in excretion and osmoregulation.

answer is D.

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Detailed Solution

The earthworm is a hermaphrodite (bisexual), i.e., testes and ovaries are present in the same individual. There are two pairs of testes present in the 10^thand 11^th segments. One pair of ovaries is attached at the inter-segmental septum of the 12^th and 13^th segments.

Earthworms have photoreceptors in the anterior end that can distinguish light intensities.

Nephridia help in excretion (not Malpighian tubules).

General body surface help in exchange of gases earthworms (no organised respiratory structures).

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