Consider the following statements:
The rate of decomposition is high if:
I: | The detritus is rich in lignin and chitin. |
II: | The detritus is rich in nitrogen and sugars. |
III: | The environmental conditions are warm and moist. |
Which of the above statements are true?
1. | I and II only | 2. | I and III only |
3. | II and III only | 4. | I, II, and III |
1. | Decomposition is largely an anaerobic process. |
2. | In a particular climatic condition, decomposition rate is slower if detritus is rich in lignin and chitin, and quicker, if detritus is rich in nitrogen and water-soluble substances like sugars. |
3. | Warm and moist environment favour decomposition whereas low temperature and anaerobiosis inhibit decomposition. |
4. | Detritus is the raw material for decomposition |
Decomposers like fungi and bacteria are :
i. | Autotrophs |
ii. | Heterotrophs |
iii. | Saptrotrophs |
iv. | Chemo-autotrophs |
Choose the correct answer :
1. | i and ii | 2. | i and iv |
3. | ii and iii | 4. | i and iii |