Edexcel IAL Biology 5.10 Biomass and energy transfer efficiency

Identify energy entering and leaving the named level, divide in the correct direction, multiply by 100 and retain ecological units and requested precision.

Exam points

Calculate percentage energy loss or transfer efficiency between trophic levels.
Convert biomass or energy units and report values in standard form when required.
Explain limited food-chain length through energy loss and reduced available biomass.

[Maximum number: 1]

Lions, giraffes and acacia trees are found on the African Plains.
The diagram shows the energy in the trophic levels that these organisms occupy.

Figure for Question 5.10—Biomass and energy transfer efficiency question 1 — Edexcel A-Level Biology A2

Calculate the efficiency of energy transfer between trophic level one and trophic level two.

All question bank results loaded

5.10—Biomass and energy transfer efficiency question 1