Question

How is fertilisation in a hen different from fertilisation in a frog​

Answer 1

Below mentioned is brief note of how fertilization in a hen is different from fertilization in a frog -

Explanation:

• Internal fertilization occurs in hens. Fertilized egg is enclosed in a protective shell covering in the hen's body and is laid outside for development.

• In frogs, fertilization and development of zygote both takes place outside of their body, that is, external fertilization.

• External and internal fertilization are forms of reproduction that vary in method and embryo development.

• External fertilization is characterized by the release of both sperm and eggs into an external environment; sperm will fertilize the egg outside of the organism, as seen in spawning.

• Internal fertilization is characterized by sperm fertilizing the egg within the female; the three methods include: oviparity (egg laid outside female body) ,ovoviparity(egg held within female), and viviparity (development within female followed by live birth).