Which of the following activities most clearly takes place in the rods and cones?

The tendency to interpret an object as always being the same physical dimensions, regardless of its distance from the viewer, is known as _____________

a) size constancy b) shape constancy c) brightness constancy d) color constancy

Close to ________ percent of all childbirths in the U.S. occur out of wedlock

a. 20 b. 30 c. 40 d. 50