O-LevelBiologyEcology & Environment5090/11 · May/June 2021 · Q291 Mark
Which statements are correct? 1 Energy cannot be recycled in food webs. 2 Producers make their own organic nutrients. 3 The Sun is the principal source of energy input to biological systems.
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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