Question

Seasonal changes bring about scenes like this one. Plant cells respond to changes in _________________ and as a result, photosynthesis slows and leaves change color.

Answer 1

The answer is; light intensity & temp change

As winter approaches, the chlorophyll molecules reduce (by being broken down) and this is why leaves begin to turn orange as there are more red pigments (Xanthophyll) than the green pigment. This is because as winter approached, the light intensity decreases and it gets colder. Therefore, the plants begin to prepare for the harsh incoming weather. Most deciduous trees even begins to shed their leaves.

Answer 2

Light intensity & temp change