Home Biology The Living World Previous Year Questions Which one of the following structures is hap…
Biology The Living World Previous Year Questions Single Correct MCQ
Published on: August 12, 2026

Which one of the following structures is haploid in its ploidy level?

A
Microspore Mother Cell
B
Protonemal cell of a moss
C
Primary endosperm nucleus in dicot
D
Primary Endospore Nucleus

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The correct answer is:
B

Microspore Mother Cell – Diploid (2n), undergoes meiosis to form haploid microspores.

Protonemal cell of a moss – Haploid (n), as it belongs to the gametophyte stage in moss life cycle.

Primary endosperm nucleus in dicot – Triploid (3n), formed by fusion of male gamete with two polar nuclei.

Primary endospore nucleus – Not a standard biological term (likely a typo/misprint).

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