Question

Which among the following is incorrect about Annelids?

(a) The name Annelids is derived from the word “Annulus” which means small ring like structure

(b) Some of these organisms are dioecious while few others are monoecious

(c) The level of organization in these organisms is organ level of organization

(d) The circulatory system is of open type

This question was posed to me during a job interview.

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

Answer 1

Correct option is (d) The circulatory system is of open type

To explain I would say: The name Annelids is derived from the word “Annulus” which means small ring like structure. Some of these organisms are dioecious while few others are monoecious. The level of organization in these organisms is organ level of organization. The circulatory system is of closed type.