CAIE IGCSE Biology 19.2.12 Pyramids of Biomass Questions
Practise explaining how a pyramid of biomass accounts for organism mass when representing a food chain, unlike a pyramid of numbers.
- Syllabus
- 2026–2028
- Course
- Biology 0610
Exam points
- compare a pyramid of biomass with a pyramid of numbers as representations of a food chain
- explain how biomass accounts for differences in organism size that a count of individuals does not show
CAIE IGCSE Biology 19.2.12 Pyramids of Biomass Questions question 1
A scientist studied communities in different parts of a desert and estimated the biomass of the organisms in each area.
He divided the organisms into four groups according to their roles in the food web as shown in Table 2.1.
Detritivores are animals that eat dead organisms or parts of organisms.
Table 2.1
Some of these results are shown as a pyramid of biomass in Fig. 2.2.
Fig. 2.2
Explain the advantages of presenting information about food webs as a pyramid of biomass and not as a pyramid of numbers.
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