Chapter 9 · CBSE Class 7 Biology (NCERT Curiosity)

Life Processes

Explore the basic processes all living things carry out to survive, including nutrition and respiration.

⚡ Chapter 9

9.1

Types of Nutrition

Autotrophic organisms (like plants) make their own food through photosynthesis. Heterotrophic organisms (like animals) obtain food by consuming other organisms.

1

Is a plant autotrophic or heterotrophic?

Autotrophic, since it makes its own food through photosynthesis

2

Is a cow autotrophic or heterotrophic?

Heterotrophic, since it obtains food by eating plants

9.2

Basics of Respiration

Respiration is the process by which living things release energy from food, usually using oxygen, and it happens continuously in all living cells.

1

What is respiration?

The process by which living things release energy from food

2

Does respiration only occur in animals, or in plants too?

Both — all living things, including plants, carry out respiration continuously

Practice

Exercises

1. What is autotrophic nutrition?

2. What is heterotrophic nutrition?

3. What is respiration?

4. Do plants respire?

5. Name one gas typically involved in respiration.