Visual "pop-out," or the eye-catching effect, of such visual stimuli as lines, shapes, edges, spots, and colors occurs because your visual system is highly sensitive to perceptual

Margaret Washburn is best known

a. as the first African-American female to be awarded a Ph.D. in 1933 and as an early leader in the debate about how to best educate African-American children. b. for writing the first American psychology textbook and teaching the first course in psychology. c. as the first woman to be awarded a Ph.D. in psychology and for writing an influential book on animal behavior, titled The Animal Mind. d. as a neo-Freudian and one of the founders of humanistic psychology.

When an egg is fertilized, the sperm contributes ____ chromosomes

a) 12 b) 74 c) 23 d) 46 e) 14