Visible light provides green plants with the energy needed to drive photosynthesis.
Horticulturists know that for many plants leaf color depends on how brightly lit the growing area is: a
plant grown with low levels of light will be dark green, while the same plant grown with high levels will
be pale green.
a.) Use the photon theory of light to explain why it is advantageous for a plant adapt this way (i.e. to be
dark green when grown with low levels of light and pale green with high levels of light).
b.) What change in leaf composition might account for this behavior?