AP BIOLOGY

Detailed explanation-1: -The absorption spectrum of chlorophylls includes wavelengths of blue and orange-red light, as is indicated by their peaks around 450-475 nm and around 650-675 nm.

Detailed explanation-2: -Within the visible spectrum, green leaves have the highest absorptance in the blue region, followed by red. Green light is least absorbed by green leaves, which gives leaves their green appearance (McCree, 1971; Zhen et al., 2019). Figure 1.

Detailed explanation-3: -Wavelengths absorbed by chlorophyll and other photosynthetic pigments generate electrons to power photosynthesis. All photosynthetic organisms have chlorophyll a which absorbs violet-blue and reddish orange-red wavelengths. Chlorophyll a reflects green and yellow-green wavelengths.

Detailed explanation-4: -Chlorophyll a absorbs violet and orange light the most. Chlorophyll b absorbs mostly blue and yellow light. They both also absorb light of other wavelengths with less intensity.

Detailed explanation-5: -Red and blue light is believed to have a higher quantum yield of CO2 assimilation. The blue and red parts of the spectrum are effective to satisfy the energy requirement of plants. Hence plants absorb these two colors more than any other color.