In the flowering plants, diploid cells in the stamen undergo meiosis and directly produce four haploid:

Question

Quizplus · Accepted Answer

Diploid cells in the stamen undergo meiosis to produce microspores, which are haploid and develop into pollen grains that contain sperm. Eggs are produced in the ovary of the flower, not in the stamen. Polar nuclei and tube nuclei are produced in the ovary and are involved in fertilization, not meiosis in the stamen.

In the Flowering Plants, Diploid Cells in the Stamen Undergo