State the advantages of sexual reproduction over asexual reproduction.

Explain the term "Regeneration" as used in relation to reproduction of organisms. Describe briefly how regeneration is carried out in multicellular organisms like Hydra.

What changes take place in boys during the reproductive phase?

‘Grafting is a common method of obtaining a superior plant from two different plants’. Explain.

What is placenta? Describe its two major functions.

In the context of reproduction of species state the main difference between fission and fragmentation. Also give one example of each.

List three techniques that have been developed to prevent pregnancy. Which one of these techniques is not meant for males? How does the use of these techniques have a direct impact on the health and prosperity of a family?

Define the term pollination. Differentiate between self pollination and cross pollination. What is the significance of pollination?

List and explain in brief three methods of contraception.

When is vegetative propagation used? Name any three methods of vegetative propagation.