structure of pollen grain and the process of its germination with diagram
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the diagram of pollen grain
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Pollen grains are male counterpart of plant reproductive structures. It has two outer layers, outer exine has tough resistant material called sporopollenin and the inner layer intine is made of cellulose.
Explanation:
In the inner layers of pollen, it has cytoplasm and two nucleus, or one nucleus, which later develops into two.
One nucleus is called tube nucleus and other one is called generative nucleus.
These nucleus are released into pollen tube, which enters ovule through micropyle and fertilizes.
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