The photograph shows a locust - Edexcel - GCSE Biology - Question 5 - 2017 - Paper 1
Question 5
The photograph shows a locust.
(a) (i) Locusts feed on maize plants and locusts are eaten by lizards. Lizards are eaten by snakes.
Complete a food chain for these ... show full transcript
Worked Solution & Example Answer:The photograph shows a locust - Edexcel - GCSE Biology - Question 5 - 2017 - Paper 1
Step 1
Complete a food chain for these organisms.
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Answer
Maize (plants) → Locusts → Lizards → Snakes
Step 2
Complete the sentence by putting a cross (X) in the box next to your answer.
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Answer
D sunlight
Step 3
Calculate how much of the maize plant biomass is passed on to the locusts.
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Answer
To calculate the biomass passed to the locusts:
Biomass of maize plants = 8800g
Percentage passed to locusts = 8%
Calculation:
ext{Biomass passed to locusts} = 8800 imes rac{8}{100} = 704g
Step 4
State one reason why only 8% of the biomass from the maize plants is passed on to the locusts.
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Answer
Only a portion of the energy stored in the maize plants is converted to biomass in the locusts due to energy loss through metabolic processes, waste, and not every part of the plant is consumed.
