Sperm and egg fuse together to form zygote.

Seminiferous tubules are found in :

Observe the picture. Answer the following question:

This is the life cycle of a _____.

Observe the picture. Answer the following question:

The cluster of eggs produced by this animal is called _____.

Modern techniques like a surrogate mother, sperm bank, and IVF technique will help human beings. Justify this statement.

Explain the concept of IVF.