NCERT Class 9 Science Exploration: Chapter 11 — 11. Reproduction: How Life Continues
This chapter, "11. Reproduction: How Life Continues," from NCERT Class 9 Science Exploration, delves into the fundamental biological process of reproduction. It explains that reproduction is essential for the continuation of life on Earth, enabling organisms to produce new individuals of their own kind, thus ensuring species survival. The chapter introduces two primary modes: asexual reproduction, where a single parent produces genetically identical offspring, and sexual reproduction, which involves two parents and results in offspring with a mix of characteristics. This variation, accumulated over generations, aids in adaptation and the evolution of new species. The text highlights asexual reproduction in unicellular and simple multicellular organisms, as well as vegetative propagation in plants, where new plants grow from existing parts like stems and leaves. It also touches upon the agricultural applications of asexual reproduction techniques. This chapter provides a foundational understanding of reproductive strategies in living beings, crucial for CBSE science learning.
Quick info
| Board | CBSE / NCERT |
|---|---|
| Class | Class 9 |
| Subject | Science |
| Book | Exploration |
| Chapter | Chapter 11 — 11. Reproduction: How Life Continues |
| Language | English |
| PDF type | NCERT Textbook |
| Session | CBSE 2026 |
| Reading time | 3 minutes |
| Word count | 414 |
Learning outcomes
- Understand the importance of reproduction for the continuation of life.
- Differentiate between asexual and sexual reproduction.
- Identify examples of asexual reproduction in unicellular and multicellular organisms.
- Explain the concept of vegetative propagation in plants.
- Recognize the agricultural applications of asexual reproduction techniques.
Vocabulary
| Word | Meaning |
|---|---|
| Reproduction | A biological process by which living beings produce new individuals of their own kind. |
| Asexual Reproduction | Reproduction where a single parent produces offspring that are almost exact copies of the parent. |
| Sexual Reproduction | Reproduction where offspring inherit a mix of characteristics from two individuals. |
| Vegetative Propagation | A type of asexual reproduction in plants where new plants arise from vegetative parts like stems or leaves. |
| Genetically identical | Individuals that have the same genetic makeup. |
| Life span | The duration of time from birth to death of an organism. |
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Practice questions
- What is reproduction? Answer: Reproduction is a biological process by which living beings produce new individuals of their own kind.
- Name the two main ways living beings reproduce. Answer: The two main ways are asexual reproduction and sexual reproduction.
- What is asexual reproduction? Answer: Asexual reproduction is a process where a single parent produces offspring that are genetically identical to the parent.
- What is vegetative propagation? Answer: Vegetative propagation is a type of asexual reproduction in plants where new plants grow from vegetative parts like stems, roots, or leaves.
Frequently asked questions
Why is reproduction important for living beings?
Reproduction is important because it ensures the continuation of life on Earth and the survival of species by producing new individuals.
What is the difference between asexual and sexual reproduction?
In asexual reproduction, a single parent produces offspring that are genetically identical. In sexual reproduction, offspring inherit characteristics from two parents, leading to variation.
Give examples of organisms that reproduce asexually.
Examples include bacteria, amoeba, yeast, hydra, and many plants through vegetative propagation.
What is vegetative propagation?
Vegetative propagation is a method of asexual reproduction in plants where new plants grow from vegetative parts like stems, roots, or leaves, without the involvement of seeds.
How is asexual reproduction helpful in agriculture?
Asexual reproduction methods like cutting, grafting, and tissue culture are used in agriculture to efficiently propagate desirable crops on a large scale.
Why do complex animals and plants mostly use sexual reproduction?
Sexual reproduction leads to genetic variation, which helps complex organisms adapt to changing environments and evolve over time.
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NCERT Class 9 Science — Exploration — Chapter 11 — 11. Reproduction: How Life Continues. Verified by NCERT Help Editorial Team. Reviewed on 29 Jul 2026. Last updated 10 Aug 2026.