Question

Read the following statements and select the incorrect ones.
(i) Circulatory system in arthropods is of closed type.
(ii) Parapodia in annelids help in swimming.
(iii) Phylum Mollusca is the second largest animal phylum.
(iv) Aschelminthes are dioecious.

• A. (i) and (iii) only
• B. (i) only
• C. (iii) only
• D. (iii) and (iv) only

Answer 1

The correct option is B (i) only

Circulatory system in arthropods is of open type. i.e. blood flows in the general body cavity called haemocoel. It does not flow in definite blood vessels.