Indicate the flow of energy in an ecosystem. Why is it unidirectional? Justify.

5

(a)

What are decomposers? List two consequences of their absence in an ecosystem?

5

(a)

Suggest any four activities in daily life which are eco-friendly.

5

(a)

Give two differences between food chain and food web.

5

(a)

Name the wastes which are generated in your house daily. What measures would you take for their disposal?

5

(a)

Suggest suitable mechanism (s) for waste management in fertilizer industries.

5

(a)

What are the by-products of fertiliser industries? How do they affect the environment?

5

(a)

Explain some harmful effects of agricultural practices on the environment.

5

(a)

Explain the flow of energy in an ecosystem.

5

(a)

What are the characteristics of food web?

5

(a)