First slide

Classification of Animals

Question

Consider following things
A. Water Vascular system
B. Adult with radial symmetry and larva with bilateral symmetry
C. Indirect development
D. Excretory system is absent
Choose from above which are correct about star fish

Easy

A

only A & B is true
B

A, B C & D are true
C

only C is true
D

only B & D are true

Solution

Star fish belongs to Echinodermata. The adult echinoderms are radially symmetrical but larvae are bilaterally symmetrical. The most distinctive feature of echinoderms is the presence of water vascular system which helps in locomotion, capture and transport of food and respiration, excretory system is absent and development is indirect with free-swimming larva. They do not have specific excretory structures.

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