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Post fertilization events Video Lecture - NEET

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1. What are the post-fertilization events in plants?
Ans. Post-fertilization events in plants include processes such as double fertilization, endosperm development, embryo development, seed formation, and fruit development.
2. What is double fertilization in plants?
Ans. Double fertilization is a unique process that occurs in flowering plants (angiosperms), where two sperm cells are involved in fertilizing two different structures within the ovule. One sperm fertilizes the egg to form the zygote, while the other sperm combines with the two polar nuclei to form the endosperm.
3. How does endosperm development occur after fertilization?
Ans. After double fertilization, the endosperm develops within the ovule. It is a nutritive tissue that provides nourishment to the developing embryo. The endosperm is typically triploid (having three sets of chromosomes) and undergoes multiple rounds of mitosis to increase in size before the embryo starts developing.
4. What happens during embryo development after fertilization?
Ans. After fertilization, the zygote undergoes several divisions and differentiations to form an embryo. The embryo development involves the formation of various tissues and organs, including the shoot apical meristem, root apical meristem, cotyledons, and embryonic axis. It eventually develops into a mature plant.
5. How are seeds and fruits formed after fertilization?
Ans. After successful fertilization, the ovary of the flower develops into a fruit, which encloses the seeds. The seeds consist of the embryo, endosperm (in some cases), and seed coat. The fruits play a crucial role in seed dispersal, protecting the seeds, and providing an environment for germination.
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