Question

Q. Consider the following statements with reference to decomposition by detritivores:

Which of the above given statements is/are correct?

• A.
  1 only
• B.
  2 only
• C.
  Both 1 and 2
• D.
  Neither 1 nor 2

Answer 1

The correct option is A

1 only
Explanation:

Statement 1 is correct: Anaerobiosis inhibits the process of decomposition. It occurs when the rate of absorption of oxygen by microorganisms is greater than the rate of diffusion of oxygen by either air or water. Warm and humid conditions promote decomposition, while low temperature and anaerobiosis prevent decomposition resulting in organic materials being built up.

Statement 2 is incorrect: Decomposition is in large part a mechanism that involves oxygen. The rate of decomposition is regulated by the detritus chemical composition and climatic factors. The rate of decomposition in a particular climatic condition is slower if detritus is rich in lignin and chitin and faster if detritus is rich in nitrogen and water-soluble substances such as sugars.