Question

Identify the correct statements:

A. Detrivores perform fragmentation.

B. The humus is further degraded by some microbes during mineralization. 

C. Water soluble inorganic nutrients go down into the soil and get precipitated by a process called leaching. 

D. The detritus food chain begins with living organisms. 

E. Earthworms break down detritus into smaller particles by a process called catabolism. 

Choose the correct answer from the options given below:

• A. B,C, D only
• B. C, D, E only
• C. D, E, A only
• D. A, B, C only

Answer 1

The Correct Option is D

To identify the correct statements, let's analyze each one:

1. Statement A: Detrivores perform fragmentation.
   Detrivores are organisms that feed on dead organic matter. Fragmentation is the process of breaking down large pieces into smaller ones, which is indeed carried out by detrivores. Thus, this statement is correct.
2. Statement B: The humus is further degraded by some microbes during mineralization.
   Mineralization is the process where organic matter is converted into inorganic substances by microbial action. Hence, humus being degraded by microbes fits this description. Therefore, this statement is correct.
3. Statement C: Water soluble inorganic nutrients go down into the soil and get precipitated by a process called leaching.
   Leaching is the washing away of nutrients from the soil by water. It typically involves the movement of dissolved substances. So this statement correctly describes the leaching process. Thus, this statement is correct.
4. Statement D: The detritus food chain begins with living organisms.
   The detritus food chain starts with dead organic matter, not living organisms. Therefore, this statement is incorrect.
5. Statement E: Earthworms break down detritus into smaller particles by a process called catabolism.
   Catabolism is a metabolic process involving the breakdown of complex molecules within living organisms. However, earthworms break down detritus physically, which is not catabolism. Therefore, this statement is incorrect.

Based on the analysis, the correct statements are A, B, C.

Answer 2

The provided statements A, B, C, D, and E describe processes within the detritus food chain. However, D and E are inaccurate:

D: This statement suggests that the detritus food chain commences with living organisms, which is incorrect. 
In reality, it begins with dead organic matter. 
E: The statement incorrectly labels the process of breaking down detritus into simpler forms as "catabolism," specifically attributed to earthworms. In truth, this process does not have a specific term and is not solely carried out by earthworms.

Conversely, statements A, B, and C accurately represent processes within the detritus food chain.
Therefore, the correct option is (D) : A, B, C only.