Question

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

• A. Egg nucleus and secondary nucleus
• B. Nucellus and antipodal cells
• C. Egg cell and antipodal cells
• D. Megaspore mother cell and antipodal cells

Answer 1

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.