if 10,000 J of energy fall on piece of land , then what is enrergy at `T_2` levels ?

Options

A. 1000 J
B. 10 J
C. 100 J
D. 1 J

Answer

To solve the question of how much energy is available at the T2 level when 10,000 J of energy falls on a piece of land, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the 10% Law**: The 10% law in ecology states that when energy is transferred from one trophic level to the next, only about 10% of the energy is passed on. The remaining 90% is lost primarily through metabolic processes as heat.

2. **Identify the Initial Energy**: In this case, the initial energy falling on the land is 10,000 J. This energy is primarily utilized by producers (like plants) at the first trophic level (T1).

3. **Calculate Energy at T2 Level**: Since the energy transferred to the next trophic level (T2) is only 10% of the energy available at T1, we can calculate it as follows:
\[ \text{Energy at T2} = \text{Energy at T1} \times 10\% \]
\[ \text{Energy at T2} = 10,000 \, \text{J} \times 0.10 = 1,000 \, \text{J} \]

4. **Conclusion**: The energy available at the T2 level is 1,000 J.

### Final Answer:
The energy at T2 levels is **1,000 J**.

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