NEET 2026
- Exam
- NEET
- Year
- 2026
- Subject
- Biology
- Chapter
- Chapter
NEET 2026 · Biology · Chapter
Given below are some statements related to the process of...
Given below are some statements related to the process of decomposition in an ecosystem:
A. Humification leads to the accumulation of a dark coloured amorphous substance which is highly susceptible to microbial action.
B. Decomposition is largely an oxygen-requiring process.
C. The rate of decomposition is slower if detritus is rich in lignin and chitin.
D. Bacterial and fungal enzymes degrade detritus into simpler inorganic substances by the process called catabolism.
E. Low temperature and anaerobiosis favour decomposition resulting in a rapid breakdown of organic materials.
Choose the correct answer from the options given below:
A. Humification leads to the accumulation of a dark coloured amorphous substance which is highly susceptible to microbial action.
B. Decomposition is largely an oxygen-requiring process.
C. The rate of decomposition is slower if detritus is rich in lignin and chitin.
D. Bacterial and fungal enzymes degrade detritus into simpler inorganic substances by the process called catabolism.
E. Low temperature and anaerobiosis favour decomposition resulting in a rapid breakdown of organic materials.
Choose the correct answer from the options given below:
Options
- AA, B and C only
- BB, C and D only
- CC, D and E only
- DA, D and E only
Correct answer
B. B, C and D only
Step-by-step solution
Statement A is incorrect because humification leads to the accumulation of a dark coloured amorphous substance called humus, which is highly resistant to microbial action and undergoes decomposition at an extremely slow rate.
Statement B is correct because decomposition is largely an oxygen-requiring (aerobic) process.
Statement C is correct because the rate of decomposition is slower if detritus is rich in lignin and chitin, and quicker if detritus is rich in nitrogen and water-soluble substances like sugars.
Statement D is correct because bacterial and fungal enzymes degrade detritus into simpler inorganic substances by the process called catabolism.
Statement E is incorrect because low temperature and anaerobiosis inhibit decomposition resulting in a build-up of organic materials, whereas warm and moist environments favour decomposition.
Therefore, statements B, C, and D are correct.
Answer: B, C and D only
Statement B is correct because decomposition is largely an oxygen-requiring (aerobic) process.
Statement C is correct because the rate of decomposition is slower if detritus is rich in lignin and chitin, and quicker if detritus is rich in nitrogen and water-soluble substances like sugars.
Statement D is correct because bacterial and fungal enzymes degrade detritus into simpler inorganic substances by the process called catabolism.
Statement E is incorrect because low temperature and anaerobiosis inhibit decomposition resulting in a build-up of organic materials, whereas warm and moist environments favour decomposition.
Therefore, statements B, C, and D are correct.
Answer: B, C and D only