First slide

Classification of Animals

Question

Which of the following is incorrect about cyclostomes?

Moderate

A

Ectoparasites on some fishes
B

Have 6 -15 pairs of gillslits
C

Migrate to marine waters for spawning
D

Have a sucking and circular mouth

Solution

Cyclostomes are marine but migrate for spawning to freshwater. After spawning, within a few days, they die. Their larvae, after metamorphosis, return to the ocean.

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