Which of the following statement is incorrect about the reproduction in Lamprey?

Larvae migrate to oceans

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Larva undergoes metamorphosis to form the juvenile

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Juvenile cyclostomata are parasites

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Juvenile forms migrate to marine water

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Solution

The correct option is D Juvenile forms migrate to marine water
Petromyzon (Lamprey) belongs to the class Cyclostomata. The larvae of cyclostomes migrate downstream to the oceans (marine water) and undergo metamorphosis to form the parasitic juvenile. As the juvenile mature into adults, they migrate to the freshwater (streams) for spawning, following which they die after a few days.

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