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[" Q.It.(a) Name the orycanic material e...

[" Q.It.(a) Name the orycanic material exine of the pollen prain in mate velled "],[" is this material advantagreous to pollen grain "7],[" (b) Still it is observed that it does not form a continuous layer arownd the "],[" grain.Give reason."],[" (c) How are 'pollen banks" useful? "]

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(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 ?

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

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

What is the function of exine of an angiosperm pollen grains ? Name the organic materials, it is made up of .

Name the pore found on the exine of the pollen grains (A) Micropores (B) Germpore (C) Micropyle (D) Lentical

In dicots, at how many places exine is absent in the pollen grain ? (a) 2 (b) 3 (c) 1 (d) more than 3

(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?

Assertion (A): Germ pores are the regions where intine comes out to form a pollen tube after pollination. Reason (B): Germ pores are prominent apertures of pollen grains where exine is thin or absent.