ADDITIONAL QUESTIONS :
Why do you think the exine of pollen grain should be hard? What is the function of germ pore?

Why do you think the noble gases are placed in a separate group?

C. ADDITIONAL QUESTIONS : What are gemmules? Give their functions.

Why do you think the zygote is dormant for sometime in a fertilised ovule?

ADDITIONAL QUESTIONS : The diagram below shows a germinating pollen grain and a mature ovule from an insect-pollinated flower. Some parts have been labelled. Give the letter of the nucleus which fuses with a male nucleus to form each of the following : (i) The zygote (ii) The endosperm

Why do you think the zygote is dormant for sometime in a fertilized ovule?