what are ubish bodies? Related: Introduction of Sexual Reproduction in Flowering Plants?

Question

what are ubish bodies? Related:  Introduction of Sexual Reproduction in Flowering Plants?

Answer

As we know, Tapetum is the innermost nutritive layer of the wall of microsporangium, hence the degeneration of the tapetal cells leads to the formation of the PRO-UBISCH BODY, and when they get surrounded by the SPOROPOLLENIN, they form the UBISCH BODY or ORBICULES. Ubisch bodies are involved in external thickening of the outer layer of pollen grain i.e. these help in exine formation.. Hope it helps..

Answer

Ubisch bodies are the small acellular structure of sporopollenin. They are present in cells of tapetum and help in the development of pollen grains. ... They appear in the cytoplasm of the tapetal cells during the spore wall formation....   Sexual reproduction is the production of a new organism from two parents by making use of their gametes or sex cells. Plants also have male and female sex organs. These sex organs in plants are carried within the flower and the seeds which are inside a fruit. Such plants are called angiosperms or flowering plants as they reproduce by sexual reproduction method.

Answer

Introduction of Sexual Reproduction in Flowering Plants

Sexual reproduction is a biological process that involves the fusion of male and female gametes to form a zygote, which develops into a new organism. In flowering plants, sexual reproduction involves the production of flowers that contain male and female reproductive structures.

Development of Flowers
Flowers are the reproductive structures of flowering plants. They are composed of four main parts: sepals, petals, stamens, and carpels. The sepals and petals protect the reproductive structures and attract pollinators, while the stamens and carpels are the male and female reproductive structures, respectively.

Formation of Gametes
The stamens produce pollen, which contains male gametes. The carpels contain the ovules, which contain female gametes. Pollination occurs when pollen is transferred from the stamens to the carpels, either by wind, water, or animals.

Fertilization
Once the pollen reaches the carpel, it germinates and grows a pollen tube that penetrates the ovule. The male gametes then travel through the pollen tube and fuse with the female gametes, resulting in the formation of a zygote.

Seed Production
After fertilization, the ovule develops into a seed, which contains an embryo and a food supply. The embryo develops into a new plant, while the food supply provides nourishment for the developing embryo.

Conclusion
Sexual reproduction in flowering plants is a complex process that involves the development of flowers, formation of gametes, fertilization, and seed production. This process ensures genetic diversity and allows for adaptation to changing environments.

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