In which one of the following groups an animals are hermaphrodite

Options

A. Hydea, Ascaris, Pheretima
B. Hydra, Homo sapiens, Leech
C. Tapeworm, Toad, Starfish
D. Hydra, Leech, Tapeworm

Answer

D

Explanation

Water vascular system or ambulacral system is a unique system of echinoderms which helps mainly in locomotion. It is infact a modified part of coelom consisting of a system of canals containing sea water and amoeboid corpuscles. It helps in locomotion by providing a hydraulic pressure mechanism of tube feet may serve for respiratory exchange of gases. Tube feet also help in anchoring the body to substratum and in capturing and handling the food.