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O-LevelBiologyEcology & Environment5090/12 · Oct/Nov 2022 · Q301 Mark

What is the principal source of energy input to biological systems?

Afood chains
Bphotosynthesis
Cproducers
Dthe Sun

✓ Correct answer

D: the Sun

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About this question

Topic
Ecology & Environment, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source
O-Level Biology, Oct/Nov 2022 Paper 1 Variant 2, question 30.

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