Factors Affecting Decomposition

Q.

The decomposition of matter that takes place in absence of oxygen is called ___.

Q. State whether true or false
Decomposers are very active in soils having a temperature of more than ${25}^{\circ }$ C.

1. True
2. False

Q. Choose the factor(s) affecting decomposition:

1. Chemical nature of decomposition products.
2. pH of the soil.
3. Temperature of the decomposition site.
4. Consumers living in the decomposition site.

Q. State whether true or false
Detritivores are found in abundance in neutral and slightly alkaline soils.

1. True
2. False

Q. ___ soil reduces the rate of decomposition.

1. Alkaline
2. Acidic
3. Neutral
4. Slightly alkaline

Q.

The chemical energy trapped in the dead bodies is released through

1. Decomposition

2. Fungi and bacteria

3. Both a and b

4. None of these

Q.

Among the following, where do you think the process of decomposition would be the fastest?

1. Tropical rain forest

2. Antarctic

3. Dry arid region

4. Alpine region

Q. Regarding assertion and reason, choose the right option.

Assertion [A]: The rate of decomposition of detritus is reduced in the regions of higher altitude.
Reason: At higher altitudes the temperature becomes very low

1. A is correct, R is incorrect
2. Both A and R are correct and R does not explain A

3. Both A and R are correct and R explains A

4. Both A and R are incorrect

Q. Regarding the assertion and reason choose the right option.
Assertion [A]: Warm and moist environment can enhance the rate of decomposition.
Reason [R]: Anaerobic condition can enhance the rate of decomposition.

1. Both A and R are true R does not explain A
2. A is true and R is false
3. Both A and R are false
4. Both A and R are true and R explains A

Q. Decomposition is an ___ dependent process.

1. Oxygen
2. Nitrogen
3. None of the above
4. Carbon dioxide