Preserving food, less fighting for food, less roaming to hunt and gather. More stable sense of community. More children. Preserving food, less fighting for food, less roaming to hunt and gather. More stable sense of community. More children.
Contrast sensitivity is the ability of an imaging process to produce an image of objects or tissues in the body that have relatively small physical differences or inherent contrast. The contrast that is to be imaged is in the form of some specific physical characteristic.
A) Rods absorb light throughout the visual spectrum but confer only gray tone vision. B) In dim light, images are focused directly on the rods in the fovea centralis. C) Three types of color-sensitive photoreceptors exist: red, green, and yellow. perceived is black.