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Sexual Reproduction in Flowering Plants In One Shot (NCERT) - 1 Video Lecture | One-Shot Videos for NEET

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1. What is sexual reproduction in flowering plants?
Ans. Sexual reproduction in flowering plants refers to the process of reproduction where two parent plants contribute their genetic material to produce offspring. It involves the fusion of male and female reproductive structures, namely the pollen grains and the ovules, respectively. This process leads to the formation of seeds, which eventually develop into new plants.
2. How do flowering plants reproduce sexually?
Ans. Flowering plants reproduce sexually through a process called pollination. Pollen grains, which contain the male gametes, are transferred from the anther of a flower to the stigma of the same or another flower. This can occur through various agents such as wind, water, insects, or animals. Once pollination occurs, the male gametes travel through the style to reach the ovule, where fertilization takes place. The fertilized ovule then develops into a seed.
3. What are the male and female reproductive structures in flowering plants?
Ans. In flowering plants, the male reproductive structure is the stamen, consisting of the filament and the anther. The anther produces pollen grains, which contain the male gametes. The female reproductive structure is the pistil, which consists of the stigma, style, and ovary. The stigma is the receptive surface for pollen, while the style connects the stigma to the ovary. The ovary contains ovules, which house the female gametes.
4. What is the significance of sexual reproduction in flowering plants?
Ans. Sexual reproduction in flowering plants is significant for several reasons. Firstly, it leads to the formation of genetically diverse offspring, allowing for adaptation to changing environments. Secondly, it promotes genetic recombination, which can result in the elimination of harmful mutations and the enhancement of advantageous traits. Lastly, sexual reproduction allows for the exchange of genetic material between different individuals, contributing to the overall genetic diversity of the plant population.
5. How does the process of fertilization occur in flowering plants?
Ans. Fertilization in flowering plants occurs when the male gametes from the pollen grains reach the ovule. After pollination, the pollen grain germinates on the stigma and forms a pollen tube. This tube grows through the style towards the ovary. Eventually, the male gametes travel down the pollen tube and enter the ovule. One male gamete fuses with the egg cell, forming a zygote, while another male gamete fuses with the two polar nuclei, forming endosperm. These fertilization events lead to the formation of an embryo and endosperm, which develop into a seed.
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