Question

Read the given features
1. Endoskeleton of calcareous ossicles
II. Organ system level of organisation
III. Larvae with bilateral symmetry
IV. Absence of excretory system
The above features hold true for
0 Elephas
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O
Euspongia
O Echinus
©
Catla​

Answer 1

absence of excretory system

Answer 2

Answer:

Echinus

Explanation:

bcoz these all features are of echinodermata