Module: | Pre-fertilization: Micro/Megasporogenesis
Q1: Consider the following statements regarding Microsporogenesis and the role of the Tapetum:
1. The tapetum is the innermost wall layer of the microsporangium and nourishes the developing pollen grains.
2. Microspore mother cells (MMCs) undergo mitotic division to form a tetrad of microspores.
3. The sporogenous tissue occupies the centre of each microsporangium when the anther is young.
Which of the above statements is/are correct?
2. Microspore mother cells (MMCs) undergo mitotic division to form a tetrad of microspores.
3. The sporogenous tissue occupies the centre of each microsporangium when the anther is young.
Which of the above statements is/are correct?
✅ Correct Answer: B
The correct option is B. Statements 1 and 3 are correct, while Statement 2 is incorrect.
Microsporogenesis is the biological process involving the formation of microspores from a pollen mother cell (PMC) or microspore mother cell (MMC) through meiosis, not mitosis.
Structurally, a typical angiosperm anther is bilobed and tetrasporangiate, surrounded by four wall layers: epidermis, endothecium, middle layers, and the tapetum.
The outer three layers provide protection and facilitate anther dehiscence, whereas the tapetum acts as a vital nutritive layer.
Historically, the tapetum's ploidy level and secretory functions (such as producing sporopollenin precursors) have been tested heavily in past NEET papers.
The causal reason for its dense cytoplasm and multinucleate state is the intense metabolic activity required to support the rapid meiotic division and subsequent development of the sporogenous tissue.
Microsporogenesis is the biological process involving the formation of microspores from a pollen mother cell (PMC) or microspore mother cell (MMC) through meiosis, not mitosis.
Structurally, a typical angiosperm anther is bilobed and tetrasporangiate, surrounded by four wall layers: epidermis, endothecium, middle layers, and the tapetum.
The outer three layers provide protection and facilitate anther dehiscence, whereas the tapetum acts as a vital nutritive layer.
Historically, the tapetum's ploidy level and secretory functions (such as producing sporopollenin precursors) have been tested heavily in past NEET papers.
The causal reason for its dense cytoplasm and multinucleate state is the intense metabolic activity required to support the rapid meiotic division and subsequent development of the sporogenous tissue.