Question 24
Question 24 of 40
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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
6. Plant nutrition
6.1. Photosynthesis

Investigate and describe the effects of varying light intensity, carbon dioxide concentration and temperature on the rate of photosynthesis

14. Coordination and resp...
14.5. Tropic responses

Explain the role of auxin in controlling shoot growth, limited to: (a) auxin is made in the shoot tip (b) auxin diffuses through the plant from the shoot tip (c) auxin is unequally distributed in response to light and gravity (d) auxin stimulates cell elongation

8. Transport in plants
8.4. Translocation

Explain why some parts of a plant may act as a source and a sink at different times