What is meant by pollination? Name and differentiate between the two modes of pollination in flowering plants.

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

Explain, what happens to the egg once it gets fertilized in a human female?

Explain the mechanism of sex determination in humans.

Draw a diagram of the female reproductive system and explain its various parts.

What is the probability of a girl or a boy being born in a family? Justify your answer.

Why is variation beneficial to the species but not necessarily for the individual?

Explain why, more complex multicellular organisms cannot give rise to new organisms through regeneration.

Describe the grafting method for the artificial propagation of plants with the help of labelled diagrams.

What is vegetative propagation? State two advantages and two disadvantages of this method.