According to the trichromatic theory of color vision: question 6 options: 1) there are three types of rods, each responsive to a different color. 2) cones come in three basic varieties: red-sensitive, green-sensitive, and blue-sensitive. 3) there are three basic colors, or wavelengths. 4) cones respond to either red–green or blue-yellow

The development of simple stone tools by early hominids led to the ability to procure meat more efficiently. this in turn led to the change in diet that included larger amounts of protein. many scholars believe that this shift in diet was a significant part of how our ancient ancestors adapted so quickly to a varied set of environments, and thus were able to begin cultural development. this demonstrates the intimate connection between