AP BIOLOGY

Detailed explanation-1: -Chlorophyll is a pigment that gives plants their green color, and it helps plants create their own food through photosynthesis.

Detailed explanation-2: -In plants, chlorophyll a and chlorophyll b are the main photosynthetic pigments. Chlorophyll molecules absorb blue and red wavelengths, as shown by the peaks in the absorption spectra above.

Detailed explanation-3: -Solution : Chl-a is the only pigment that can absorb and convert light energy into chemical energy, therefore it is called an essential pigment.

Detailed explanation-4: -So, Chlorophyll a is the chief pigment of photosynthesis and others (i.e., chlorophyll-b, xanthophyll and carotenoids) are accessory pigments.