LIGHT - Plant Responses to Light

Deep Dive Into Light.  Octopot Education:
We know plants absorb light via chlorophyll, but what other plant responses are influenced by light and specifically what kind of light?  In this post we acknowledge light wavelength shifts, and evolutionary responses from plants.  We also look at how plants use light even before they emerge from the soil!
Plants don't use clocks or watches, so how do they know when it's day, night, or when to flower?  We identify Photoperiodism and dive into the science of phytochrome and its relation to Red & Far-red spectrums of light.