Question

Which among the following is incorrect about nervous system in Annelids?

(a) Each segment has ganglia that help in the muscular movements

(b) They have two ventral nerve chords throughout the body

(c) Specialized sensory receptors to help in sense of touch and light

(d) The pigmented photo receptors are called Oceli

This question was posed to me in examination.

My question is from Classification of Animal Kingdom into Different Phylum-3 in portion Animal Kingdom of Biology – Class 11

Answer 1

Correct choice is (d) The pigmented photo receptors are called Oceli

Explanation: Annelids have ganglia in each segment that help in the muscular movements. They have two ventral nerve chords throughout the body. Specialized sensory receptors are present to help in sense of touch and light. Pigmented photo receptors called Oceli are present in Annelids.