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Exclusively marine animals are found in phyla
Option: 1
Echinodermata and Ctenophora
Option: 2
Echinodermata and Annelids
Option: 3
Ctenophora and Sponges
Option: 4
Echinodermata and Mollusca
Answers (1)
Phylum Echinodermata
- The term ‘Echinodermata’ is obtained from the Greek words echinos meaning spiny and dermos meaning skin.
- This phylum includes sea stars, sea cucumbers, sea urchins, sand dollars, and brittle stars.
- These are exclusively marine.
- These are triploblastic with a true coelom.
- They bear resemblance to chordates in showing radial cleavage in embryo and development of blastopore that forms anus.
-
Echinoderms and ctenophores are exclusively marine animals.
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