Question 26
Question 26 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
13. Photosynthesis
13.2. Investigation of limiting fac...

explain the effects of changes in light intensity, carbon dioxide concentration and temperature on the rate of photosynthesis

8. Transport in mammals
8.3. The heart

describe the cardiac cycle, with reference to the relationship between blood pressure changes during systole and diastole and the opening and closing of valves

14. Homeostasis
14.2. Homeostasis in plants

explain that stomata respond to changes in environmental conditions by opening and closing and that regulation of stomatal aperture balances the need for carbon dioxide uptake by diffusion with the need to minimise water loss by transpiration