why evolution selected green as a form of photosynthesis?

Answer 1

Although the primary photoreactive pigment used by plants for photosynthesis (chlorophyll) reflects green light (absorbing the reds and blues more efficiently, and using the energy from those wavelengths to power the chemical reactions), it is not the only pigment used by plants.

Other pigments such as xanthophylls (yellow), and various carotenoids (oranges, reds) also facilitate photosynthesis. These pigments are often present in many of the leaves that are normally green with chlorophyll, just in smaller amounts, so that the chlorophyll predominates. You can see these colours in the autumn, as they break down more slowly than chlorophyll does.

As to why it evolved that chlorophyll is the dominant photochemical pigment used, it's because chlorophyll is the most efficient pigment used by plants. It's a distinct evolutionary advantage to use the most efficient product available, and chlorophyll is cheaper to produce, garners more energy per molecule, and absorbs the widest light spectra of any of the other pigments. So natually, plants use more of it than the other pigments.

Answer 2

Green isn't a "form" of photosynthesis. It happens that the receptors receiving light waves give the plant it's color. The color is a result of the organism making the best use of the light available (sunlight) and it just happens to reflect in the green spectrum. Presumably other colors would give differing efficiencies of use of light for food.

Answer 3

Green isn't a form of photosynthesis. Plants photosynthesize are green because they reflect the green light. They absorb all the other colors of light except green.

Answer 4

it isnt green. it looks green but the light is absorbed by blue and purple, it refracts green, thats why you see it.