Consider the following facts:
CO2 and light energy are needed in chloroplasts to carry out photosynthesis.
Light heats up leaves when it is absorbed.
CO2 enters leaves and water evaporates from leaves through open stomata.
Water evaporating from a surface cools that surface.
Based on these facts, which statement best provides a hypothesis for what might happen as atmospheric CO2 levels increase during global climate change?
A) Fewer stomata will be needed for photosynthesis, so plants will have less capacity for evaporative cooling of large leaves.
B) High CO2 levels will cause damage to plants with large leaves because of suffocation.
C) Large leaves will capture too much light compared with the amount of CO2 they can take up, so they will decrease in size to avoid light.
D) More stomata will be needed, so plants with large leaves will lose too much water.
E) High CO2 levels will cause an increase in leaf size, shading the plants and limiting plant growth capacity.
Correct Answer:
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