Name the organic materials the exine and latine of an angiosperm pollen grains are made up of. Explain the role of exine.

Name the organic material of exine and intine of an angiospermic pollen grain. Mention their role.

Exine of pollen grains is made up of

Exine of pollen grain in made up of

Exine of pollen grain is made up of

Exine in pollen grain in made up of

Exine of pollen grain

Exine of pollen grain

(i) Draw a diagram of a section of a megasporangium of a flowering plant and label funiculus, micropyle, nucellus and embryo sac in it. (ii) Name the organic material exine of the pollen grain is made up of. How is this material advantageous to the pollen grain?

(a) Name the organic material exine of the pollen grain is made up of. How is this material advantageous to pollen grain ? (b) Still it is observed that it does not form a continuous layer around the pollen grain. Give reason. (c) How are 'pollen banks' useful ?

(a) Name the organic material exine of the pollen grain is made up of. How is this material advantageous to pollen grain ? (b) Still it is observed that it does not form a continuous layer around the pollen grain. Give reason. (c) How are 'pollen banks' useful ?