As each cell of the sporogenous tissue is capable of giving rise to a microspore tetrad. Each one is a potential pollen or microspore mother cell. The process of formation of microspores from a pollen mother cell (PMC) through meiosis is called microsporogenesis. The microspores, as they are formed, are arranged in a cluster of four cells–the microspore tetrad. As the anthers mature and dehydrate, the microspores dissociate from each other and develop into pollen grains. Inside each microsporangium several thousands of microspores or pollen grains are formed that are released with the dehiscence of anther.
Microsporogenesis directly produces mature pollen grains from pollen mother cells through meiosis.
Microsporogenesis produces MICROSPORES (arranged in a tetrad). Microspores only later DISSOCIATE and MATURE into pollen grains after anther dehydration.
Microsporogenesis = PMC → meiosis → microspore TETRAD. Pollen forms LATER, after dissociation + maturation.
Assertion (A): Microsporogenesis is the process of male gametophyte formation in anthers. Reason (R): Microsporogenesis directly produces mature pollen grains from pollen mother cells.
Correct answer: C — A is true but R is false.
Assertion TRUE: Microsporogenesis occurs in anthers and produces microspores which give rise to the male gametophyte (pollen grain). Reason FALSE: NCERT explicitly says microsporogenesis is 'formation of MICROSPORES from a PMC through meiosis' — NOT direct formation of mature pollen. Microspores are arranged in a tetrad first; mature pollen forms only AFTER dissociation and further development. Answer: A true, R false → C. Memory: PMC → meiosis → microspore tetrad → (later) pollen.
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