Question

Which is common between earthworm, leech and centipede?

• A. They have Malpighian tubules.
• B. They are hermaphrodite.
• C. They have ventral nerve cord.
• D. None of the above.

Answer 1

The correct option is C They have ventral nerve cord.

Option A is incorrect as earthworm and leech are annelids and have nephridia as their excretory organs, while centipedes are arthropods and have Malpighian tubules as excretory organs. Option B is incorrect as earthworm and leech are hermaphrodites (each organism carries both male and female reproductive organs, while centipedes have either male or female sex organs. Ventral nerve cord is a backward extension of circumpharyngeal connective that are held together and consists of the segmental ganglion. It makes the nervous system of many invertebrates, like annelids and arthropods which make option C correct.