The trichromatic theory of color vision is based on the idea that the retina contains __________
a) three classes of cells that alter their rates of firing according to color.
b) three types of rods that respond to different saturation levels.
c) rods, cones and a third type of cell called a muon that, depending upon the hue, stimulates different combinations of cones to fire.
d) three types of cones that respond maximally to one of three colors - red, green or blue.
d Explanation: This is the basic premise of Helmholtz's trichromatic theory of color vision.
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Which of the following statements is true about research ethics?
A) Research ethics apply to human research but not animal research. B) Research ethics apply to animal research but not human research. C) Research ethics apply to both human and animal research. D) Research ethics are another word for laws.
_____________ refers to a situation when a particular characteristic allows an organism to be more reproductively successful, causing the characteristic to become more prevalent
a. Natural selection b. Darwinism c. Artificial selection d. Mutation