Increasing the number of stomata per unit surface area of a leaf ...

[Sandstorm]

Increasing the number of stomata per unit surface area of a leaf when atmospheric CO2 levels decline is most analogous to a human
A) breathing faster as atmospheric CO2 levels increase.
B) putting more red blood corpuscles (RBCs) into circulation when atmospheric O2 levels decline.
C) removing RBCs from circulation when atmospheric O2 levels increase.
D) breathing more slowly as atmospheric O2 levels increase.

[Hungry!]

Try B, I remember this on my test last week. I'm sure I got it right

[Sandstorm]

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