IB Biology SL 4.2.11 Pyramids of energy Question Bank

Practise IB Biology SL 4.2.11 by constructing and interpreting pyramids of energy for ecosystems.

Exam points

Explain what a pyramid of energy represents.
Interpret energy-pyramid units and compare energy transfer between trophic levels.

[Maximum number: 3]

The following table shows the approximate production of organisms living in a salt marsh in the USA.

Table for Question C4.2.11—Energy pyramids question 1 — IB Biology SL

Construct a pyramid of energy showing the trophic levels for this salt marsh.

Official answer image from the markscheme.

Correct shape of pyramid with base larger than primary consumer and secondary consumer smaller than the rest.
Pyramid proportions very close to 80:10:1 / correctly labelled values with units: 24000, 3000 and $300\ \mathrm{kJm}^{-2}\mathrm{y}^{-1}$ .
Correctly labelled levels.

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C4.2.11—Energy pyramids question 1