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 Form 3 Biology questions and answers on ecology

(a) What is meant by each of the following:
(i) Pyramid of biomass?
(ii) Pyramid of numbers?
(b) During an ecological visit to the Savannah Grassland, students were able to see lions, antelopes, vultures and pastoralists grazing their cattle. Construct a food chain with four consumer levels to illustrate the energy flow in the ecosystem.

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Answer Text:
(a) (i) - Graphical representation producing pyramid shaped histogram using measurement of total dry weight of organisms from each trophic level in a food chain.
(ii) - Graphical representation producing pyramid shaped histogram using measurement of total numbers of organisms constituting from each trophic level in a food chain.
(b) Grass #rarr# antelopes #rarr# human being #rarr# lion #rarr# vultures


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