How do fraternal twins develop?
a. When two eggs are fertilized by the same sperm
b. When two sperm fertilize the same egg
c. When a fertilized ovum divides to give two identical fertilized ova
d. When two different sperm fertilize two different ova
e. When a single sperm fertilizes two different ova
d. When two different sperm fertilize two different ova
You might also like to view...
DARE, the often-used drug prevention program is ______ successful.
A. not at all B. somewhat C. quite D. very
The most frequently used strategy for promoting long term maintenance that is implemented during therapy is
a. prolonged stimulus control. b. mindful acceptance. c. self-control coping skills training. d. booster sessions.
There is a(n) ________ relation between speed and accuracy
a. direct b. indirect c. inverse d. complex
George trains a pigeon to peck a disk by reinforcing each disk peck. Once the response is learned, George begins to cut back on the reinforcers. At first he reinforces every other response, then every third response, every fifth response, every tenth response, and so on. George is using a procedure called _________
a. ratio tuning b. reinforcement decimation c. intermittent reinforcement d. stretching the ratio