Which statement best describes the hypothesis for why high atmospheric CO 2 limited evolution of large megaphylls?

The hypothesis suggests that high atmospheric CO 2 limited the evolution of large megaphylls because with high CO 2 , fewer stomata were needed, resulting in less capacity for evaporative cooling of large leaves. This limited their growth and size.

Which statement best describes the hypothesis for why high atmospheric CO 2 limited evolution of large megaphylls?

The hypothesis suggests that high atmospheric CO 2 limited the evolution of large megaphylls because with high CO 2 , fewer stomata were needed, resulting in less capacity for evaporative cooling of large leaves. This limited their growth and size.

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Which Statement Best Describes the Hypothesis for Why High Atmospheric

Question 208

Multiple Choice

Which statement best describes the hypothesis for why high atmospheric CO₂ limited evolution of large megaphylls?

A) The CO₂ caused global warming, shading the plants and limiting plant growth capacity.
B) High CO₂ caused too much damage to plants with large leaves, because of suffocation.
C) Large leaves captured too much light compared with the amount of CO₂ they could take up, so they stayed small to avoid light.
D) With high CO₂, more stomata were needed, so the plants with large leaves lost too much water.
E) With high CO₂, fewer stomata were needed, so the plants had less capacity for evaporative cooling of large leaves.

Correct Answer: