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The three cells found in a pollen grain when it is shed at 3-celled stage are
  • a)
    1 vegetative cell, 1 generative cell, 1 male gamete
  • b)
    1 vegatative cell, 2 male gametes
  • c)
    1 generative cell, 2 male gametes
  • d)
    either (a) or (b)
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
The three cells found in a pollen grain when it is shed at 3-celled st...
A pollen grain with pollen tube carrying male gametes represents mature male gametophyte. It is 3-celled (one tube cell +2 male gametes) and 3-nucleated (one tube nucleus + two nuclei of each male gamete) structure.
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Most Upvoted Answer
The three cells found in a pollen grain when it is shed at 3-celled st...
Explanation:
When a pollen grain is shed at the 3-celled stage, it consists of three cells. These cells are:

1. Vegetative Cell:
The vegetative cell is the largest cell in the pollen grain. It is responsible for providing nourishment and support to the developing pollen tube. The pollen tube is essential for the transport of the male gametes from the stigma to the ovule.

2. Generative Cell:
The generative cell is a small cell located within the vegetative cell. It is responsible for the production of male gametes or sperm cells. The generative cell undergoes mitosis to produce two male gametes.

3. Male Gametes:
The generative cell produces two male gametes through mitosis. These male gametes are also known as sperm cells. They are released from the generative cell and are involved in the process of fertilization. One of the male gametes fuses with the egg cell to form the zygote, while the other male gamete fuses with the central cell to form the endosperm in angiosperms.

Conclusion:
Therefore, when a pollen grain is shed at the 3-celled stage, it consists of 1 vegetative cell and 2 male gametes. Hence, option B is the correct answer.
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