Figure 54.5 -Plants Never Use 100% of the Incoming Solar Radiation for Solar

Multiple Choice

Figure 54.5
-Plants never use 100% of the incoming solar radiation for photosynthesis on a yearly basis.What is a reasonable explanation for this?

A) Plants cannot photosynthesize during winter (in cold winter climates) .
B) Plants cannot photosynthesize on cloudy days.
C) The pigments that drive photosynthesis respond to only a fraction of the wavelengths available,and plants cannot photosynthesize on cloudy days.
D) The pigments that drive photosynthesis respond to only a fraction of the wavelengths available,and plants cannot photosynthesize during winter (in cold winter climates) .
E) The pigments that drive photosynthesis respond to only a fraction of the wavelengths available,and plants cannot photosynthesize during dry periods.