Exercises - Chapter 12: How Nature Works in Harmony

Questions and Answers

1. Refer to the given diagram (Population → Community → Ecosystem) and select the wrong statement.

(i) A community is larger than a population. (ii) A community is smaller than an ecosystem. (iii) An ecosystem is part of a community.

2. If all decomposers suddenly disappear from a forest ecosystem, what changes do you think would occur? Explain why decomposers are essential.

3. Selvam shared that his village was less affected by the 2004 Tsunami due to the presence of mangrove forests. How did mangroves protect the village?

4. Look at this food chain: Grass $\rightarrow$ Grasshopper $\rightarrow$ Frog $\rightarrow$ Snake. If frogs disappear, what will happen to the population of grasshoppers and snakes? Why?

Interactive Diagram•study Mode

www.bionotes.in

Chapter 12: How Nature Works in Harmony - Exercises

Exercises - Chapter 12: How Nature Works in Harmony

Questions and Answers

1. Refer to the given diagram (Population → Community → Ecosystem) and select the wrong statement.

2. If all decomposers suddenly disappear from a forest ecosystem, what changes do you think would occur? Explain why decomposers are essential.

3. Selvam shared that his village was less affected by the 2004 Tsunami due to the presence of mangrove forests. How did mangroves protect the village?

4. Look at this food chain: Grass $\rightarrow$ Grasshopper $\rightarrow$ Frog $\rightarrow$ Snake. If frogs disappear, what will happen to the population of grasshoppers and snakes? Why?

5. In a school garden, students noticed fewer butterflies. What could be the reasons? What steps can they take?

6. Why is it not possible to have an ecosystem with only producers and no consumers or decomposers?

7. Human-made ecosystems like agricultural fields are necessary, but they must be made sustainable. Comment.

8. If the Indian hare population drops because of a disease, how would it affect the number of other organisms in a food web?

On this page

BioBot

Chapter 12: How Nature Works in Harmony - Exercises

Exercises - Chapter 12: How Nature Works in Harmony

Questions and Answers

1. Refer to the given diagram (Population → Community → Ecosystem) and select the wrong statement.

2. If all decomposers suddenly disappear from a forest ecosystem, what changes do you think would occur? Explain why decomposers are essential.

3. Selvam shared that his village was less affected by the 2004 Tsunami due to the presence of mangrove forests. How did mangroves protect the village?

4. Look at this food chain: Grass $\rightarrow$ Grasshopper $\rightarrow$ Frog $\rightarrow$ Snake. If frogs disappear, what will happen to the population of grasshoppers and snakes? Why?

5. In a school garden, students noticed fewer butterflies. What could be the reasons? What steps can they take?

6. Why is it not possible to have an ecosystem with only producers and no consumers or decomposers?

7. Human-made ecosystems like agricultural fields are necessary, but they must be made sustainable. Comment.

8. If the Indian hare population drops because of a disease, how would it affect the number of other organisms in a food web?

On this page

Chapter 12: How Nature Works in Harmony - Exercises

Show Answer

Show Answer

Show Answer

Show Answer

Show Answer

Show Answer

Show Answer

Show Answer

On this page

BioBot

Chapter 12: How Nature Works in Harmony - Exercises

Show Answer

Show Answer

Show Answer

Show Answer

Show Answer

Show Answer

Show Answer

Show Answer

On this page