Find out the correct statement. :

Options

A. Trophic level represents a functional level , not a species as such .
B. A given species never occupies more than one trophic level in the same ecosystem at the same time .
C. In most of the ecosystems , producers are less in number and biomass than the herbivores.
D. Pyramid of energy can never be upright .

Answer

To solve the question, "Find out the correct statement," we will analyze each option provided and determine which one is accurate based on ecological principles.

### Step-by-Step Solution:

1. **Analyze Option A**:
- Statement: "A trophic level represents a functional level, not a species as such."
- Explanation: This statement is correct. A trophic level can include multiple species that perform similar functions within an ecosystem. For example, both rats and rabbits may occupy the same trophic level as herbivores, but they are different species. Thus, this statement accurately reflects the concept of trophic levels in ecology.

2. **Analyze Option B**:
- Statement: "A given species can occupy more than one trophic level in the same ecosystem at the same time."
- Explanation: This statement is incorrect. While some species can occupy different trophic levels at different times (e.g., a species that is a herbivore at one stage of its life and a carnivore at another), they cannot occupy more than one trophic level simultaneously within the same ecosystem.

3. **Analyze Option C**:
- Statement: "In most ecosystems, producers are less in number and biomass than herbivores."
- Explanation: This statement is also incorrect. Generally, producers (like plants) are more numerous and have greater biomass than herbivores in an ecosystem. This is a fundamental principle of ecology, where energy decreases as it moves up trophic levels.

4. **Analyze Option D**:
- Statement: "The pyramid of energy can never be upright."
- Explanation: This statement is incorrect. The pyramid of energy is typically upright, showing that energy decreases as it moves from producers to herbivores to carnivores. An upright pyramid reflects the loss of energy at each trophic level.

### Conclusion:
After analyzing all options, the correct statement is **Option A**: "A trophic level represents a functional level, not a species as such."