The basic units of sound in a language, which are called _____, vary in number from one language to the next

The idea that the eye contains separate receptors for red, green, and blue is known asthe ______ theory

a. opponent-process c. additive color mixing b. trichromatic d. reductive color mixing

In a cross-sectional design, adults in different age groups have different educational or

historical experiences or __________ differences. Fill in the blanks with correct word