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Why is the visual pathway backwards? Why would it be advantageous to evolve in a way where the absence of stimuli(darkness) depolarizes the cell?

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Why is the visual pathway backwards? Why would it be advantageous to evolve in a way where the absence of stimuli(darkness) depolarizes the cell?	1
So is all of the Earth's elements just made of Helium from the sun that has just been radiated?	0