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Question

Polygonum type of embryo sac is?


A

8-nucleate, 7-celled

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B

8nucleate, 8-celled

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C

7-nucleate, 7-celled

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D

4-nucleate, 3-celled

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Solution

The correct option is A

8-nucleate, 7-celled


The correct option is A:

Explanation for the correct answer :

  1. A typical angiosperm embryo sac, at maturity, though 8- nucleate is 7-celled.
  2. At the time of fertilization, the female gametophyte has 3 antipodal cells +2synergids +1 egg cell +1 central cell, which equals 7- celled structure.
  3. The central cell has polar nuclei, making2 polar nuclei, which makes it 8- nucleate.
  4. Therefore, at maturity, the gametophyte is 7-celled and 8- nucleated.

Final Answer :

As a result, the correct answer is '8-nucleate, 7-celled'.


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