Grass `rarr` Deer `rarr` 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 find the biomass of the tiger in the given food chain (Grass → Deer → Tiger), we can use the 10% energy transfer rule. Here’s a step-by-step solution:

### Step 1: Understand the Energy Transfer
In a food chain, energy is transferred from one trophic level to the next. According to the 10% law of energy transfer, only 10% of the energy from one level is passed on to the next level.

### Step 2: Calculate the Energy for the Deer
The biomass of grass is given as 1 tonne, which is equivalent to 1000 kg. When the deer consumes the grass, it only receives 10% of that energy.
- Energy transferred to the deer = 10% of 1000 kg
- Energy transferred to the deer = 0.10 × 1000 kg = 100 kg

### Step 3: Calculate the Energy for the Tiger
Now, the deer is the next trophic level, and it will transfer 10% of its energy to the tiger.
- Energy transferred to the tiger = 10% of 100 kg
- Energy transferred to the tiger = 0.10 × 100 kg = 10 kg

### Conclusion
The biomass of the tiger will be 10 kg.

### Final Answer
The biomass of the tiger is **10 kg**.

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