Draw the diagram of a flower and label the four whorls. Write the names of gamete producing organs in the flower.

Distinguish between pollination and fertilisation. Mention the site and product of fertilisation in a flower. Draw a neat, labelled diagram of a pistil showing pollen tube growth and its entry into the ovule.

Distinguish between a gamete and zygote. Explain their roles in sexual reproduction.

What is placenta? Mention its role during pregnancy?

What are various ways to avoid pregnancy? Elaborate any one method.