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In one of the following fishes, the dors...

In one of the following fishes, the dorsal fin is modified into suckers

A

Torpedo

B

Echeneis

C

Hippocampus

D

Neoceratodus

Text Solution

Verified by Experts

The correct Answer is:
B
Hydroid colony of Obelia is dimorphic, exhibiting two type of individuals or zooids which differ both morphologically as well as physiologically. These two zooids are -
(i) Polyps - the nutritive zooid of the colony
(ii) Gonangium - the reproductive zooid.
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