Question

Which one of the following statements is correct about decomposition?
A. Decomposition rate is slower if detritus is rich in nitrogen and water-soluble substances like sugars.
B. Decomposition rate is slower if detritus is rich in nitrogen and water-soluble substances like sugars, and quicker if detritus is rich in lignin and chitin.
C. Decomposition rate is slower if detritus is rich in cellulose, and quicker if detritus is rich in phosphorus
D. Decomposition rate is quicker if detritus is rich in lignin, and lower if detritus is rich in sulphur.

Answer 1

Hint: Decomposition is a process in which dead organic matter is broken down into simpler substances by the means of enzymes. There are various factors which influence decomposition.

Complete step by step answer: It is the process by which biological materials decompose into more basic elements. Any living thing's body begins to break down soon after it dies. Animals like worms aid in the organic matter's breakdown. Decompose is defined as to cause anything to rot or degrade, to break down into smaller parts or disintegrate into the earth. A dead body decomposes when it degrades to the point where some of its components finally dissolve into the ground.
The rate of organic matter decomposition is influenced by climatic factors, including temperature, rainfall, soil moisture, and soil aeration (oxygen levels). In warm, humid climates, organic matter breaks down more quickly while in cool, dry conditions, it takes longer.
 Detritus that is high in lignin and chitin decomposes more slowly than detritus that is high in nitrogen and water-soluble materials, such as sugars.
So, option (A) is correct.
Note:
The starting point for decomposition is debris. Organisms known as detritivores are those that break down debris into smaller pieces. A compound which is rich in lignin decomposes slowly because enzymes act slowly on them.