The tendency of preoperational children to be captivated by a single aspect of a given situation to the exclusion of other relevant details exemplifies Piaget's concept of

Mike is trying to find his car keys in the dark. Why are his rods more useful in the dark than his cones?

a) Rods need less light to be activated. b) Rods have a direct route to bipolar cells. c) He is color blind and therefore has trouble seeing in the dark. d) His keys are on a green key chain and cones can't detect color.

The gland that produces the largest number of different hormones and has the widest range of effects on the body's functions is the ______ gland

a. pituitary b. adrenal c. pineal d. thyroid