(A) Each trophic level, a certain mass of living material at a particular time and as …….P……….
(B)Breakdown of detritus into smaller particles , this process is called ………Q……….
Fill in the blanks with suitable word.

Options

A. `{:(P,Q),("Decomposition","Mineralization"):}`
B. `{:(P,Q),("Production","Humification"):}`
C. `{:(P,Q),("Standing","Fragmentation"):}`
D. `{:(P,Q),("Standing","Stratification"):}`

Answer

To solve the given question, we need to fill in the blanks in the two statements provided. Let's break down each statement step by step.

### Step 1: Analyze Statement (A)
The statement reads: "Each trophic level, a certain mass of living material at a particular time and as …….P………. "

- **Understanding Trophic Levels**: In ecology, a trophic level refers to the position an organism occupies in a food chain.
- **Mass of Living Material**: The mass of living material at a particular time in an ecosystem is commonly referred to as the "standing crop" or "standing biomass."
- **Conclusion for P**: Therefore, the suitable word for blank P is **"standing"** or **"standing crop."**

### Step 2: Analyze Statement (B)
The statement reads: "Breakdown of detritus into smaller particles, this process is called ………Q………. "

- **Understanding Detritus**: Detritus refers to dead organic matter, which includes decomposing plant and animal material.
- **Process of Breakdown**: The breakdown of detritus into smaller particles is known as "fragmentation." This is a crucial step in the decomposition process, where larger pieces of organic matter are broken down into smaller fragments.
- **Conclusion for Q**: Therefore, the suitable word for blank Q is **"fragmentation."**

### Final Answer
Combining both parts, we have:
- (A) Each trophic level, a certain mass of living material at a particular time and as **standing**.
- (B) Breakdown of detritus into smaller particles, this process is called **fragmentation**.

### Summary
The filled blanks are:
- P = standing
- Q = fragmentation