In animals like fish and frog .......... fertilisation take place.

External

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Internal

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Both A and B

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None of the above

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Solution

The correct option is A External
External fertilization is a strategy of fertilization in which a sperm cell unites with an egg cell in open, rather than inside specialized organs, within the bodies of parents. While, internal fertilization takes place inside the female after insemination through copulation.
Fishes and frogs are oviparous i.e., they lay eggs. And mostly in oviparous animals, fertilization is external.
Thus, the correct answer is option A.

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