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The diagram shows the energy trapped as biomass at each stage of a food chain - OCR Gateway - GCSE Biology - Question 1 - 2022 - Paper 1
Question 1
The diagram shows the energy trapped as biomass at each stage of a food chain. grass 10000 J → grasshopper 1000 J → mouse 200 J → hawk 40 J What is the percentage ... show full transcript
Worked Solution & Example Answer:The diagram shows the energy trapped as biomass at each stage of a food chain - OCR Gateway - GCSE Biology - Question 1 - 2022 - Paper 1
Step 1
What is the percentage efficiency in the transfer of energy between the grasshopper and the mouse?
Answer
To find the percentage efficiency in the transfer of energy between the grasshopper and the mouse, use the formula:
ext{Efficiency} = rac{ ext{Energy received by the next trophic level}}{ ext{Energy of the current trophic level}} imes 100-
**Identify the energies: **
- Energy of the grasshopper = 1000 J
- Energy of the mouse = 200 J
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Substitute the values into the formula:
ext{Efficiency} = rac{200 ext{ J}}{1000 ext{ J}} imes 100 = 20\ ext{\%}
Thus, the percentage efficiency in the transfer of energy between the grasshopper and the mouse is 20%. Therefore, the answer is D.