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The three cell found in a pollen grain where it is shed at 3-celled stage are - a)1 vegetative cell, 2 male gamates b) 1 generative cell ,2 male gametes . which one is correct ?
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The three cell found in a pollen grain where it is shed at 3-celled st...
**The Correct Answer:**
The correct answer is **b) 1 generative cell, 2 male gametes**.
**Explanation:**
A pollen grain is the male reproductive structure of flowering plants. It is produced in the anthers of the flower's stamen. The pollen grain contains three cells when it is shed at the 3-celled stage. These three cells are:
1. **Generative Cell:** The generative cell is one of the three cells present in the pollen grain. It is located within the cytoplasm of the larger vegetative cell. The generative cell is responsible for dividing and giving rise to the two male gametes.
2. **Tube Cell/ Vegetative Cell:** The tube cell, also known as the vegetative cell, is the larger cell in the pollen grain. It surrounds the generative cell and provides nourishment and support to it. The tube cell plays a crucial role in the pollen tube formation during pollination. It elongates and forms the pollen tube that allows the male gametes to reach the female reproductive structure of the flower.
3. **Two Male Gametes:** The generative cell undergoes mitotic division to produce two male gametes. These male gametes are small, mobile cells with flagella or cilia that aid in their movement towards the female reproductive structure. The male gametes are responsible for fertilizing the female gametes (egg cells) to initiate the process of sexual reproduction in plants.
Therefore, the correct answer is **b) 1 generative cell, 2 male gametes**. The generative cell divides to produce two male gametes, while the vegetative cell provides nourishment and support to the generative cell and helps in the formation of the pollen tube during pollination.
The correct answer is **b) 1 generative cell, 2 male gametes**.
**Explanation:**
A pollen grain is the male reproductive structure of flowering plants. It is produced in the anthers of the flower's stamen. The pollen grain contains three cells when it is shed at the 3-celled stage. These three cells are:
1. **Generative Cell:** The generative cell is one of the three cells present in the pollen grain. It is located within the cytoplasm of the larger vegetative cell. The generative cell is responsible for dividing and giving rise to the two male gametes.
2. **Tube Cell/ Vegetative Cell:** The tube cell, also known as the vegetative cell, is the larger cell in the pollen grain. It surrounds the generative cell and provides nourishment and support to it. The tube cell plays a crucial role in the pollen tube formation during pollination. It elongates and forms the pollen tube that allows the male gametes to reach the female reproductive structure of the flower.
3. **Two Male Gametes:** The generative cell undergoes mitotic division to produce two male gametes. These male gametes are small, mobile cells with flagella or cilia that aid in their movement towards the female reproductive structure. The male gametes are responsible for fertilizing the female gametes (egg cells) to initiate the process of sexual reproduction in plants.
Therefore, the correct answer is **b) 1 generative cell, 2 male gametes**. The generative cell divides to produce two male gametes, while the vegetative cell provides nourishment and support to the generative cell and helps in the formation of the pollen tube during pollination.
Community Answer
The three cell found in a pollen grain where it is shed at 3-celled st...
Thank u guys , but in Ncert pgno-23Says The generative cell divides mitotically to give rise to the two male gametes before pollen grains are shed (3-celled stage) Can u plz explain me ?
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The three cell found in a pollen grain where it is shed at 3-celled stage are - a)1 vegetative cell, 2 male gamates b) 1 generative cell ,2 male gametes . which one is correct ?
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The three cell found in a pollen grain where it is shed at 3-celled stage are - a)1 vegetative cell, 2 male gamates b) 1 generative cell ,2 male gametes . which one is correct ? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about The three cell found in a pollen grain where it is shed at 3-celled stage are - a)1 vegetative cell, 2 male gamates b) 1 generative cell ,2 male gametes . which one is correct ? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The three cell found in a pollen grain where it is shed at 3-celled stage are - a)1 vegetative cell, 2 male gamates b) 1 generative cell ,2 male gametes . which one is correct ?.
The three cell found in a pollen grain where it is shed at 3-celled stage are - a)1 vegetative cell, 2 male gamates b) 1 generative cell ,2 male gametes . which one is correct ? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about The three cell found in a pollen grain where it is shed at 3-celled stage are - a)1 vegetative cell, 2 male gamates b) 1 generative cell ,2 male gametes . which one is correct ? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The three cell found in a pollen grain where it is shed at 3-celled stage are - a)1 vegetative cell, 2 male gamates b) 1 generative cell ,2 male gametes . which one is correct ?.
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