In this question, assume that the life cycle of a flowering plant begins with the germination of a seed and ends with the development of a fruit.Two events that occur in the life cycle are the division of a microspore nucleus and the formation of sculptured wall.

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The division of a microspore nucleus (pollen grain) occurs during the process of microsporogenesis in the anthers of the flower. At the same time, the tapetum (a layer of cells surrounding the microspores) produces the sculptured wall, which surrounds the developing pollen grain. Therefore, both events occur more or less simultaneously.

In This Question, Assume That the Life Cycle of a Flowering