Which of the following is false?

Options

A. Quantity of biomass in a trophic level at a particular period is called standing crop.
B. The energy content in a trophic level is determined by considering individuals of a species in that trophic level.
C. The succession that occurs in newly cooled lava is called primary succession.
D. Rate of succession is faster in secondary succession.

Answer

To determine which statement is false among the given options, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Analyze Statement 1:**
- The statement claims that "the quantity of biomass in any trophic level at a particular period is called as the standing crop."
- This statement is true. The standing crop refers to the total biomass present in a trophic level at a specific time.

2. **Analyze Statement 2:**
- The statement claims that "the energy content of a trophic level is determined by considering the individuals of species in that trophic level."
- This statement is false. The energy content of a trophic level is determined by the primary productivity and the overall biomass of that level, not by individual species. Therefore, this statement is incorrect.

3. **Analyze Statement 3:**
- The statement claims that "the succession that occurs in a newly cooled lava is called as a primary succession."
- This statement is true. Primary succession occurs in lifeless areas, such as newly formed lava, where no soil or life existed previously.

4. **Analyze Statement 4:**
- The statement claims that "the rate of succession is faster in secondary succession."
- This statement is true. Secondary succession occurs in areas that previously had life but were disturbed, allowing for a faster recovery due to existing soil and seed banks.

### Conclusion:
After analyzing all statements, we conclude that **Statement 2 is false**.

### Final Answer:
The false statement is: **The energy content of a trophic level is determined by considering the individuals of species in that trophic level.**

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