Which of the following characteristic features holds true for all the animals of the corresponding group?

Moderate

A

Marine and asymmetrical animals with cellular level of organisation-Porifera
B

Cnidoblasts are used for anchorage, defense and for the capture of prey-Cnidaria
C

Marine, bilaterally symmetrical diploblastic animals with tissue level of organisation-Ctenophora
D

Endoparasites with dorso-ventrally flattened body and hooks and suckers-Platyhelminthes

Solution

Cnidoblasts occur in all cnidarians. Sponges are mostly marine and mostly asymmetrical. Ctenophores are radially symmetrical. Some flatworms are free-living. Hooks and suckers are absent in free-living flatworms.

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