Question

Based on the given excerpt, answer the given question.

Stamen is regarded as a microsporophyll that possesses microsporangia which have microspore mother cells that give rise to microspores. The cells of sporogenous tissues undergo meiotic division to form microspore tetrad. Microspore is present in the bilobed structure called anther. A male gametophyte is a gamete producing haploid phase in a plant. In angiosperms, it is the pollen grains that are regarded as gametophytes.

From the given options find the odd one out with respect to ploidy.
[1 mark]

• A. Microsporangia
• B. Microspore mother cell
• C. Tapetum
• D. Endothecium

Answer 1

The correct option is C Tapetum

Tapetum is the innermost layer present in the microsporangia (sac-like structure). They provide nourishment to pollen grains. Its cells called tapetal cells contain dense cytoplasm along with more than one nucleus. Hence, it is polyploid. So option c is correct.

Microspore mother cells are diploid spore producing cells that develop into haploid microspores by meiotic divisions in angiosperms.

Microsporangia is an enclosure that contains spores. Endothecium is a layer present in microsporangia. All are diploids having a single nucleus.