Which hypothesis is supported by the fact that stomates open when exposed to white light, a mixture of all colors of light?

Question

Quizplus · Accepted Answer

This fact supports only Hypothesis I, which states that stomates open in response to the blue light wavelength range. While white light contains all wavelengths of visible light, it is the blue light specifically that triggers stomatal opening, not just any color of light. Hypothesis II, which states that stomates open in response to an increase in carbon dioxide concentration, is not supported by this fact.

Which Hypothesis Is Supported by the Fact That Stomates Open