Hens and frogs are both oviparous exhibiting different types of fertilisation. Explain.



Hens are oviparous in which internal fertilisation takes place. The fertilised egg develops into an embryo inside the body. However, the development of chick from the embryo takes place outside the body. Frogs are oviparous in which both fertilisation and development of zygote to embryo and young ones occurs outside the body.

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