Question 33
Question 33 of 40
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No letter options?
Older MCQs might not have the typical A, B, C, D choices. They have choices 1, 2, 3, and a combination of them is the answer. Below is the key that maps such combinations to the answer.
A 1, 2 and 3 are correct
B 1 and 2 only are correct
C 2 and 3 only are correct
D 1 only is correct
Topics Tested
19. Organisms and their e...
19.3. Nutrient cycles

Describe the carbon cycle, limited to: photosynthesis, respiration, feeding, decomposition, formation of fossil fuels and combustion

6. Plant nutrition
6.1. Photosynthesis

Investigate the need for chlorophyll, light and carbon dioxide for photosynthesis, using appropriate controls

20. Human influences on e...
20.3. Pollution

Describe the sources and effects of pollution of the air by methane and carbon dioxide, limited to: the enhanced greenhouse effect and climate change