Grass `to` Deer `to` Tiger In this food chain, the biomass of grass is 1 tonne. The tiger biomass will be :

Options

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

Answer

To determine the biomass of the tiger in the food chain "Grass to Deer to Tiger," we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Biomass of Grass**:
- The biomass of grass is given as 1 tonne, which is equivalent to 1000 kg.

2. **Apply the 10% Rule**:
- According to the 10% rule in ecology, only 10% of the biomass from one trophic level is transferred to the next trophic level. This means that when herbivores (like deer) consume the grass, they only gain 10% of the biomass of the grass.

3. **Calculate the Biomass of Deer**:
- From the grass biomass of 1000 kg, the biomass available to the deer (the primary consumer) will be:
\[ \text{Biomass of Deer} = 10\% \text{ of } 1000 \text{ kg} = 0.1 \times 1000 \text{ kg} = 100 \text{ kg} \]

4. **Calculate the Biomass of Tiger**:
- Now, applying the 10% rule again for the tiger (the secondary consumer), which eats the deer:
\[ \text{Biomass of Tiger} = 10\% \text{ of } 100 \text{ kg} = 0.1 \times 100 \text{ kg} = 10 \text{ kg} \]

5. **Conclusion**:
- Therefore, the biomass of the tiger in this food chain is 10 kg.

### Final Answer:
The biomass of the tiger will be **10 kg**.

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