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During reproductive development in plants:
P. Male and female gametes are produced as a result of two mitotic divisions after meiosis.
Q. Vegetative cells in pollen contribute to pollen development.
R. Antipodals provide nourishment to developing embryos.
S. Pollen tube ruptures and releases both the male gametes in one of the degenerated synergids.
Which of the above statements are true?
P and Q
Q and S
Q and R
P and S
Answers (1)
Male and female gametes are not produced as a result of mitotic divisions after meiosis. In sexual reproduction, the process of gamete formation involves meiosis, which is a specialized type of cell division.
Antipodal cells are a group of cells found in the embryo sac of flowering plants. They are located at the opposite end of the embryo sac from the micropyle, which is the opening through which pollen enters. In plant reproduction, the primary source of nourishment for the developing embryo is the endosperm, a tissue formed by the fusion of a sperm cell with two polar nuclei in the central cell of the embryo sac. The endosperm provides nutrients and support for the growing embryo during seed development.
Therefore statements P and R are wrong. Hence, the correct answer is option 2.
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