Ascending trophic level in grazing food chain pyramid represents

Options

A. gradual decrease in biomass from apex to base
B. gradual decrease in biomass from base to the apex
C. gradual increase of the biomass from producers to the tertiary consumers
D. no change in biomass

Answer

**Step-by-Step Solution:**

1. **Understanding the Grazing Food Chain**: The grazing food chain consists of various trophic levels where energy flows from producers (plants) to primary consumers (herbivores), then to secondary consumers (carnivores), and finally to tertiary consumers (top predators).

2. **Pyramid of Biomass**: The pyramid of biomass illustrates the total mass of living organisms at each trophic level. In a grazing food chain, this pyramid is typically upright, indicating that the biomass decreases as you move up the trophic levels.

3. **Identifying Trophic Levels**: At the base of the pyramid, we have the producers, which have the highest biomass. As we move up to primary consumers, secondary consumers, and then tertiary consumers, the biomass decreases.

4. **Analyzing the Options**:
- **Option 1**: Gradual decrease in biomass from apex to base – This is incorrect because biomass increases from apex to base.
- **Option 2**: Gradual decrease in biomass from base to apex – This is correct because biomass is maximum at the base (producers) and minimum at the apex (tertiary consumers).
- **Option 3**: Gradual increase of the biomass from producers to tertiary consumers – This is incorrect as biomass decreases from producers to tertiary consumers.
- **Option 4**: No change in biomass – This is incorrect as there is a significant change in biomass across trophic levels.

5. **Conclusion**: The correct representation of the ascending trophic levels in a grazing food chain pyramid is that there is a gradual decrease in biomass from base to apex.

**Final Answer**: Gradual decrease in biomass from base to apex.

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