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A typical angiospemic embryo sac is though 8 nucleate is 7-celled. 8 nuclei includes______.

  • a)
    2 egg apparatus, 3 polar nuclei and 3 antipodal

  • b)
    Either (a) or (b)

  • c)
    3 egg apparatus, 3 polar nuclei and 2 antipodal

  • d)
    3 egg apparatus, 2 polar nuclei and 3 antipodal

Correct answer is option 'D'. Can you explain this answer?
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A typical angiospemic embryo sac is though 8 nucleate is 7-celled. 8 n...
The female gametophyte (embryo sac) develops from a single functional megaspore. This megaspore undergoes three successive mitotic divisions to form eight nucleate embryo sacs.
The first mitotic division in the megaspore forms two nuclei. One nucleus moves towards the micropylar end while the other nucleus moves towards the chalazal end. Then, these nuclei divide at their respective ends and re-divide to form eight nucleate stages. As a result, there are four nuclei each at both the ends i.e., at the micropylar and the chalazal end in the embryo sac. At the micropylar end, out of the four nuclei only three differentiate into two synergids and one egg cell. Together they are known as the egg apparatus. Similarly, at the chalazal end, three out of four nuclei differentiates as antipodal cells. The remaining two cells (of the micropylar and the chalazal end) move towards the centre and are known as the polar nuclei, which are situated in a large central cell. Hence, at maturity, the female gametophyte appears as a 7-celled structure, though it has 8 nucleate.
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A typical angiospemic embryo sac is though 8 nucleate is 7-celled. 8 nuclei includes______.a)2 egg apparatus, 3 polar nuclei and 3 antipodalb)Either (a) or (b)c)3 egg apparatus, 3 polar nuclei and 2 antipodald)3 egg apparatus, 2 polar nuclei and 3 antipodalCorrect answer is option 'D'. Can you explain this answer?
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A typical angiospemic embryo sac is though 8 nucleate is 7-celled. 8 nuclei includes______.a)2 egg apparatus, 3 polar nuclei and 3 antipodalb)Either (a) or (b)c)3 egg apparatus, 3 polar nuclei and 2 antipodald)3 egg apparatus, 2 polar nuclei and 3 antipodalCorrect answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about A typical angiospemic embryo sac is though 8 nucleate is 7-celled. 8 nuclei includes______.a)2 egg apparatus, 3 polar nuclei and 3 antipodalb)Either (a) or (b)c)3 egg apparatus, 3 polar nuclei and 2 antipodald)3 egg apparatus, 2 polar nuclei and 3 antipodalCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A typical angiospemic embryo sac is though 8 nucleate is 7-celled. 8 nuclei includes______.a)2 egg apparatus, 3 polar nuclei and 3 antipodalb)Either (a) or (b)c)3 egg apparatus, 3 polar nuclei and 2 antipodald)3 egg apparatus, 2 polar nuclei and 3 antipodalCorrect answer is option 'D'. Can you explain this answer?.
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