what are pollen banks

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Solution

Pollen bank is a method where pollens are stored for germ plasm collection. Different types of pollens are collected and stored here for future use. By using these pollens the plants that are facing extinction can be reproduced.

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Q. How are pollen banks useful.

Q. In pollen banks, pollen grains are stored at _______ ̊C temperature.

Q. (a) Name the organic material of the exine of the pollen grain. 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?

Q. (a) Name the organic material which makes up exine of the pollen grain. 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? [3]

Paleontological studies use fossil pollen because
A. Pollen retains viability for long periods of time unlike male gametes in animals
B. The intine of pollen is very hard and stable and can be used in rescuing plant populations on
a decline
C. The exine of pollen retains its structure for long periods of time
D. Soil pollen banks, unlike soil seed banks, stay dormant for long periods of time

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