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Question

Which one of the following pairs of plant structures has a haploid number of chromosomes?


A

Egg nucleus and secondary nucleus

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B

Nucellus and antipodal cells

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C

Egg cell and antipodal cells

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D

Megaspore mother cell and antipodal cells

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Solution

The correct option is C

Egg cell and antipodal cells


The correct option is C.

Explanation for correct option:

  1. The egg nucleus has a haploid number of chromosomes.
  2. The antipodal cells located in the embryo sac have haploid chromosomes.

Explanation for incorrect options:

Option A:

  1. The Egg nucleus is a haploid.
  2. The nucleus created when two polar nuclei fuse together is known as the secondary nucleus.
  3. Diploid in nature, it develops in the embryo sac.

Option B:

  1. The nucellus is seen in the female gametophyte.
  2. It is an important part of the ovule.
  3. It is diploid in nature.
  4. The antipodal cells are haploid.

Option D:

  1. The Megaspore mother cell (megasporocyte) is diploid.
  2. The antipodal cells are haploid.

Final answer: The egg cell and the antipodal cells have a haploid number of chromosomes.


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