Important Questions from Science 7 Chapter: Reproduction in Plants

Reproduction in plants is a vital process through which new individuals are produced, allowing for the continuation of the species. This chapter explores various aspects of plant reproduction, including the different modes of reproduction and the structures involved. Here are some important questions that can help in understanding this topic in detail:

1. What are the different modes of plant reproduction?
- Sexual reproduction: Involves the fusion of male and female gametes, leading to the formation of a zygote and subsequent development of a new individual.
- Asexual reproduction: Occurs without the involvement of gametes and typically results in the production of genetically identical offspring.

2. What are the different methods of asexual reproduction in plants?
- Vegetative propagation: Involves the production of new plants from vegetative structures like stems, roots, or leaves.
- Budding: A small outgrowth, known as a bud, develops on the parent plant and eventually detaches to form a new individual.
- Fragmentation: The parent plant breaks into fragments, and each fragment develops into a new plant.
- Spore formation: Some non-flowering plants, such as ferns and mosses, produce spores that can germinate to form new individuals.

3. What are the male and female reproductive structures in flowering plants?
- Male reproductive structure: The stamen consists of an anther and a filament. The anther produces pollen grains that contain male gametes.
- Female reproductive structure: The pistil or carpel consists of the stigma, style, and ovary. The stigma receives pollen, the style connects the stigma to the ovary, and the ovary contains ovules that develop into seeds upon fertilization.

4. How does pollination occur in plants?
- Pollination is the transfer of pollen from the anther to the stigma. It can occur through various agents, including wind, water, insects, birds, and other animals.
- Self-pollination: Occurs when pollen from the anther reaches the stigma of the same flower or another flower on the same plant.
- Cross-pollination: Involves the transfer of pollen from the anther of one plant to the stigma of another plant of the same species.

5. What happens after pollination?
- Fertilization: The fusion of the male gamete (sperm) with the female gamete (egg) within the ovule. This forms a zygote, which develops into an embryo.
- Seed formation: The fertilized ovule develops into a seed, containing the embryo, endosperm, and seed coat.
- Fruit formation: The ovary surrounding the fertilized ovule develops into a fruit, which protects the seeds and aids in their dispersal.

6. How do non-flowering plants reproduce?
- Non-flowering plants, such as mosses and ferns, reproduce through spore formation.
- Spores are tiny reproductive structures that are dispersed by wind or water.
- When a spore germinates, it develops into a gametophyte, which produces male and female gametes.
- Fertilization occurs within the gametophyte, leading to the formation of a sporophyte, which produces spores, thus completing the life cycle.

Overall, understanding the various modes and structures involved in plant reproduction is crucial

Here's are some questions ananya....

1.difference between sexual and asexaul reproduction...
2.what do you mean by sexual reproduction ?
3.Define ..
a.Fertilization ..
b.Fragmentation...
c.bisexual plants ...
d.unisexual plants ....
3.what is reproduction?
4.Diagram of a flower and explain each part of flower in brief .......
5.what is pollination?define self pollination and cross pollination.?