Question

2. Which among the following is exclusively marine?
(a) porifera
(b) echinodermata
(c) mollusca
(d) pisces
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Answer 1

Answer:

Echinodermata

Explanation:

Explanation: Echinodermata are exclusively found in the marine environment whereas Porifera, Molluscs and Pisces can be found in both marine and freshwater.

Answer 2

Answer:

OPTION C

Echinodermata are all marine and have a water vascular system. Example- Starfish, Echinus, etc. Whereas some Porifera lives in saltwater such as Haliciona and some lives in freshwater such as Spongilla. Mollusca can survive on the rocky shore, freshwater saltwater, etc. Pisces can be freshwater or saltwater.

Explanation:

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