Reproduction in plants class 7 chapter 12 - Notes, MCQ's and Extra Questions and Answers
Reproduction is the process by which living organisms produce offspring. In plants, reproduction can occur through two methods: asexual and sexual reproduction. This chapter discusses the various types of reproductive structures and processes in plants.
Asexual reproduction is the process by which a single parent produces offspring without the involvement of gametes or fertilization. This method of reproduction is common in plants and is achieved through various structures, such as runners, rhizomes, tubers, and bulbs. The chapter explains the structure and function of these reproductive structures in detail.
The chapter also discusses vegetative propagation, which is a type of asexual reproduction in which a plant produces new individuals from its vegetative parts, such as leaves, stems, and roots. The various methods of vegetative propagation, such as cutting, layering, grafting, and tissue culture, are also explained in detail.
Sexual reproduction is the process by which two parents produce offspring through the fusion of their gametes. In plants, sexual reproduction can occur through two methods: self-pollination and cross-pollination.
The chapter explains the process of pollination, which is the transfer of pollen grains from the male reproductive organs to the female reproductive organs. It discusses the different agents of pollination, such as wind, water, insects, birds, and animals, and their role in the process of pollination.
The chapter then moves on to the process of fertilization, which is the fusion of the male and female gametes to form a zygote. The structure and function of the male and female reproductive organs in plants, such as the stamen and the pistil, are also explained in detail.
The chapter also discusses the formation and development of seeds and fruits in plants. It explains the structure and function of the seed and the role of fruits in seed dispersal.
In conclusion, the chapter provides a comprehensive understanding of the different reproductive structures and processes in plants. It highlights the importance of reproduction in plant growth and development and emphasizes the role of both asexual and sexual reproduction in the production of offspring. It also emphasizes the importance of maintaining genetic diversity in plants and the role of various agents of pollination in achieving this diversity. Overall, this chapter is an essential resource for understanding the fundamentals of plant reproduction