Consider the following for statements (1 - 4 ), select the correct option starting which ones are true (T) and which ones are false (F)
(1) An orgenism at each trophic level depends on those at a higher energy demands.
(2) Each trophic level has a certain mass of living material at a particular time called standing state .
(3) Each trophic level has a certain mass of non-living material at a particular time called standing state .
(4) The number of trophic levels in a grazing food chain is not restricted.

Options

A. 1–T , 2 – T , 3 – F ,4 –F
B. 1– F , 2 – T , 3 – F ,4 –T
C. 1– T , 2 – F , 3 – T ,4 –F
D. 1– F, 2 – T , 3 – T ,4 –F

Answer

To solve the question, we need to evaluate each of the four statements regarding trophic levels and determine whether they are true (T) or false (F).

### Step-by-Step Solution:

1. **Statement 1**: "An organism at each trophic level depends on those at a higher energy demands."
- **Evaluation**: This statement is **False (F)**. In a food chain, organisms at a lower trophic level (like producers) provide energy for those at higher trophic levels (consumers). Therefore, organisms do not depend on those at a higher trophic level for energy.

2. **Statement 2**: "Each trophic level has a certain mass of living material at a particular time called standing state."
- **Evaluation**: This statement is also **False (F)**. The correct term for the mass of living material at a particular time is "standing crop," not "standing state." Thus, this statement is incorrect.

3. **Statement 3**: "Each trophic level has a certain mass of non-living material at a particular time called standing state."
- **Evaluation**: This statement is **False (F)**. The term "standing state" is not used for non-living material at trophic levels. Instead, it refers to the amount of specific nutrients in the soil. Thus, this statement is incorrect.

4. **Statement 4**: "The number of trophic levels in a grazing food chain is not restricted."
- **Evaluation**: This statement is **False (F)**. In a typical grazing food chain, the number of trophic levels is usually limited to about 3-4 due to energy loss at each level. Therefore, this statement is also incorrect.

### Conclusion:
All four statements are false. Therefore, the correct option is that all statements are false (F, F, F, F).