When old information gets in the way of new information, we

The trichromatic theory states that ________

a. the visual system treats triads of color as antagonistic to each other. b. three types of color feature detectors in the visual cortex are responsible for color perception. c. three types of cones exist, each sensitive to a certain range of wavelengths. d. species that detect ultraviolet light perceive three colors that are outside of the range of humans.

Life expectancies have___________ in the United States and many industrialized countries over the last 50 years

a) remained about the same b) risen c) decreased moderately d) decreased significantly