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प्रश्न
Name the organic materials exine and intine of an angiosperm pollen grains are made up of. Explain the role of exine.
उत्तर
The exine layer is made up of sporopollenin, which is one of the most resistant substances found in nature.
The intine layer is made up of cellulose and pectin materials.
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संबंधित प्रश्न
(a) Plan an experiment and prepare a flow chart of the steps that you would follow to ensure that the seeds are formed only from the desired sets of pollen grains. Name the type of experiment that you carried out.
(b) Write the importance of such experiments
Explain the role of tapetum in the formation pollen-grain wall.
Draw a labelled diagram of the T.S. of a mature anther.
Pollen grains can be stored in liquid nitrogen at ______.
In a typical complete, bisexual, and hypogynous flower the arrangement of floral whorls on the thalamus from the outermost to the innermost is ______.
The outermost and innermost wall layers of microsporangium in an anther are respectively ______.
Haploid plant cultures are got from ______.
The innermost layer of anther is tapetum whose function is ______.
How many pollen mother cells should undergo meiotic division to produce 64 pollen grains?
Sepals and petals or perianth are inconspicuous in entomophilous flowers.
