Question

Explain Internal fertilisation external developement .....

Answer 1

In this sperms are fast from the male into female body the fertilization takes place within the female body the zygote after its formation is surrounded by some secretions along with some reserve food and a cell this help in development and protection of the growing embryo which activity is commonly seen in hen animals which are not a mammal

Answer 2

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Internal fertilization means the fertilization which takes place within the female body

Example:- in hen, human beings and elephant.

There are also two types of internal fertilization.

:- internal fertilization and external development

EXTERNAL DEVELOPMENT-

External development is when the embryos develop outside of the parents. ..An example of this is when fish mate.