A parent with unfulfilled ambitions shares emotionally in her child's success. When the child is promoted, the parent feels as if she, herself, has triumphed. Her behavior exemplifies the defense mechanism of ______

Which of the following statements is true of two-year-olds?

A. They have an erratic appetite. B. They need about 2,300 calories per day. C. They need more calories per day than an infant. D. They are fairly indifferent to the taste of sugar.

To account for color vision, Helmholtz postulated the existence of:

a. three types of color receptors corresponding to three primary colors. b. separate receptors for each wavelength in the visual spectrum. c. one type of receptor that responded to all of the wavelengths in the visual spectrum. d. receptors that process pairs of opposing colors.