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.

A dithecous anther is __________.
[1 mark]

• A. unisporangiate
• B. bisporangiate
• C. trisporangiate
• D. tetrasporangiate

Answer 1

The correct option is D tetrasporangiate

An anther is a knob-like fertile part of male reproductive organ (stamen) in plants. A longitudinal groove lengthwise separates the theca (sheath or covering) in a typical anther. Now, it has 2 lobes which are termed as dithecous.

A transverse section of this typical anther shows four chambers called microsporangia inside it. Hence it is termed a tetrasporangiate. The microsporangia are the sac-like structures in which the pollen or microspores are developed. Hence option d is correct.