How do you think the change in chlorophyll levels is a response to changes in the length of day from summer to fall

In summer, the green pigments or the chlorophyll are high, while in fall the chlorophyll lowers because there is less sunlight.

chlorophyll is a green pigment, present in all green plants and in cyanobacteria, responsible for the absorption of light to provide energy for photosynthesis. Its molecule contains a magnesium atom held in a porphyrin ring.

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