AP BIOLOGY

Detailed explanation-1: -Anthocyanins absorb light in the blue-green wavelengths, allowing the red wavelengths to be scattered by the plant tissues to make these organs visible to us as red.

Detailed explanation-2: -First, because anthocyanins are responsible for the colors of fruits and flowers as well as of leaves, it was natural to concentrate on pigmentation in the former economi-cally important organs, for which the function of anthocyanin seems obvi-ous-to attract animals for pollination and seed dispersal.

Detailed explanation-3: -Anthocyanins. A third pigment, or class of pigments, that occur in leaves are the anthocyanins. Anthocyanins absorb blue, blue-green, and green light. Therefore, the light reflected by leaves containing anthocyanins appears red.

Detailed explanation-4: -The red colour is caused by pigments called anthocyanins. The pigments cause not only the red of some leaves, grapes and onions, but also the blue of blueberries and the black of soy beans. Some trees are naturally very high in these pigments and will have strong colours at all times of the year.

Detailed explanation-5: -Young leaves of many plants are transiently red because of the accumulation of anthocyanins, with the redness disappearing as leaves mature.