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प्रश्न
Give an example of a plant which came into India as a contaminant and is a cause of pollen allergy.
उत्तर
Pollen grains of many species, allergic diseases and bronchial afflictions in some people. The pollen grains of Parthenium or carrot grass which came to India as contaminant with imported wheat cause pollen allergy.
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संबंधित प्रश्न
Where is sporopollenin present in plants?
How are ‘pollen banks’ useful?
Name the organic materials exine and intine of an angiosperm pollen grains are made up of. Explain the role of exine.
Answer the following question.
Pollen banks are playing a very important role in promoting plant breeding programs the world over. How are pollens preserved in the pollen banks? Explain. How are such banks benefitting our farmers? Write any two ways.
Microsporogenesis occurs ______.
Exine of pollen grain is formed of ______.
How many microspore mother cells are required to produce 1000 microspores/pollen grains?
The innermost layer of anther is tapetum whose function is ______.
Several pollen grains form a unit designated as pollinium in Family ______.
In some members of which of the following pairs of families, pollen grains retain their viability for months after release?
