According to the chapter The Nose Knowsabout the scent of symmetry, An evolved, functional
characteristic that contributes to reproduction is an:
(a) trait
(b) adaptation
(c) characteristic
(d) gene
B
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Melatonin is a hormone that ________
a. fluctuates on about a 90-minute cycle. b. is secreted largely during hours of darkness. c. is secreted largely during hours of daylight. d. increases alertness and wakefulness.
Responding under a VI schedule of reinforcement
a. will be slower than that on a VR schedule of reinforcement when the rates of reinforcement on the two schedules are equated. b. resembles that on an FI schedule of reinforcement. Following the reinforcer there is a period of no responding, followed by a rapid rise in responding. c. is usually sporadic (now fast, now slow) rather than steady. d. shows the same short pause immediately after reinforcement that an FR schedule produces.