Select the incorrect statement from the following.

Options

A. Trophic level represents a functional level , not a species level as such .
B. The pyramid of biomass in sea is generally inverted.
C. Pyramid of biomass is inverted for tree and forest ecosystems.
D. Energy at a lower trophic level is always more then at a higher level.

Answer

To solve the question, we need to evaluate each of the four statements provided and identify which one is incorrect.

### Step-by-Step Solution:

1. **Evaluate the First Statement:**
- The statement claims that "trophic level represents a functional level, not a species level."
- This is true. Trophic levels categorize organisms based on their role in the ecosystem (producers, primary consumers, etc.) rather than their specific species.

**Hint:** Remember that trophic levels are based on feeding relationships and energy flow, not species classification.

2. **Evaluate the Second Statement:**
- The statement says, "the pyramid of biomass in sea is generally inverted."
- This is also true. In aquatic ecosystems, the biomass of primary producers (like phytoplankton) is often less than that of higher trophic levels (like fish), leading to an inverted pyramid.

**Hint:** Consider how biomass is distributed in aquatic ecosystems compared to terrestrial ones.

3. **Evaluate the Third Statement:**
- The statement claims that "the pyramid of biomass is inverted for tree and forest ecosystems."
- This statement is incorrect. In terrestrial ecosystems, such as forests, the biomass pyramid is typically upright, with a larger biomass of producers (trees) compared to consumers.

**Hint:** Think about the structure of forests and how many producers (trees) there are compared to herbivores and carnivores.

4. **Evaluate the Fourth Statement:**
- The statement says, "energy at a lower trophic level is always more than at a higher trophic level."
- This is true. According to the 10% rule of energy transfer, energy decreases as it moves up trophic levels, meaning lower levels have more energy.

**Hint:** Recall the 10% energy transfer rule and how it affects energy availability at different trophic levels.

### Conclusion:
After evaluating all four statements, we find that the third statement is incorrect. Therefore, the answer to the question is:

**Answer:** The third statement is incorrect.

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