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

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Views: 5,866 students

Updated on: Jan 7, 2023

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Book:

Oswaal CBSE Question Bank Class 12 Biology Chapterwise and Topicwise (Oswaal)

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(i) Do all pollen grains remain viable for the same length of time ? Support your answer with two suitable examples.
(ii) How are pollen grains stored in pollen banks ? State the purpose of storing pollen grains in banks.
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(i) No, Examples : (a) Cereals / rice / wheat - pollen grains / loose viability within thirty minutes of their release. (b) In some members of Rosaceae / leguminosae maintain viability for months.
(ii) Using cryopreservation techniques / in liquid nitrogen (– 196º C).
Purpose of storing pollen grains in banks-
Maintaining viability
preserving threatened species
preserving commercially important plants to be used for crop breeding programmes.
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Question Text
(i) Do all pollen grains remain viable for the same length of time ? Support your answer with two suitable examples.
(ii) How are pollen grains stored in pollen banks ? State the purpose of storing pollen grains in banks.
Updated OnJan 7, 2023
TopicSexual Reproduction in Flowering Plants
SubjectBiology
ClassClass 12
Answer TypeText solution:1 Video solution: 1
Upvotes169
Avg. Video Duration9 min