Answer:
Vegetation def is: growing plants, or a life without physical, mental or social activity
Vegetative depends on the context. Mainly just means without brain activity
When our red-sensitive nerves in our eyes cannot respond to light properly this will result in color blindness - b.
When either of the three light-sensitive nerves in our nerve tracts; either green, red or blue, we become to color blind for a certain spectrum of light from nature.
It is maintaining homeostasis
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Unicellular - composed of only one cell.
multicellular - composed of multiple cells.