First slide

Classification of Animals

Question

Which of the following statements wrongly describes Petromyzon?

Easy

A

It migrates to the sea for spawning.
B

It is ectoparasitic on fishes.
C

It has a circular mouth without jaws.
D

It exhibits indirect development.

Solution

Petromyzon (lamprey) is marine but migrates for spawning to freshwater. After spawning, within a few days, they die. Their larvae, after metamorphosis, return to the ocean.

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