Pollen banks are playing a very important role in promoting plant breeding programme the world over. How are pollens preserved in the pollen banks ? Explain. How are such banks benefitting our farmer ? Write any two ways.

Mention one application of pollen bank. How are pollen stored in a bank?

(a) Do all pollen grains remain viable for the same length of time ? Support your answer with two suitable examples. (b) How are pollen grains stored in plooens banks ? State the purpose of storing pollen grains in these banks

(a) Do all pollen grains remain viable for the same length of time ? Support your answer with two suitable examples. (b) How are pollen grains stored in plooens banks ? State the purpose of storing pollen grains in these banks

Water is an elixir of life, a very important natural resource. Your Science teacher wants you to prepare a plan flora formative assessment activity, "How to save water, the vital natural resource". Write any two ways that you will suggest to bring awareness in your neighbourhood, on 'how to save water.

(a) Water is an elixir of life, a very important natural resource. Your Science teacher wants you to prepare a plan for a formative assessment activity, "How to save water, the vital natural resource." Write any two ways that you will suggest to bring awareness in your neighbourhood, on 'how to save water'. (b) Name and explain any one way by which the underground water table does not go down further.

Artificial hybridisation is one of the major approaches for crop improvement programme. In such crosses it is important to avoid unwanted pollen. Explain how we can protect stigma from unwanted pollen.

Assertion : It is possible to store pollen grains of a large number of species for years in years in liquid nitrogen (-196^(@)C) Reason : Such stored pollen can be used as pollen banks, similar to seed banks, in crop breeding programmes.