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

1. Megaspore mother cell and antipodal cells
2. Egg cell and antipodal cells
3. Nucleus and antipodal cells
4. Egg nucleus and secondary nucleus

Correct answer: Egg cell and antipodal cells

Solution

Egg cells and antipodal cells are both part of the female gametophyte, so they carry the haploid chromosome number (n). In contrast, the secondary nucleus is typically diploid after fusion of two polar nuclei, and the megaspore mother cell is diploid before meiosis.

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