A-LevelBiologyBiodiversity and conservation9700/12 · May/June 2013 · Q391 Mark
Which statements about energy flow in ecosystems are correct? 1 All energy eventually leaves ecosystems in the form of heat. 2 The average energy transfer between trophic levels is 10%. 3 The energy stored and lost from an ecosystem is equal to the energy input from the Sun.
A1, 2 and 3
B1 and 2 only
C1 and 3 only
D2 and 3 only
✓ Correct answer
A: 1, 2 and 3
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