What exciting event occurs first during the second trimester of a pregnancy?
A) Morning sickness eases
B) The first visit to the obstetrician
C) First sensations of fetal movement
D) Couples can start having sex again
C
Psychology
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Professor Marshall wants to know whether eating sweets before bedtime causes children to take longer to fall asleep. In his experiment, whether or not a sweet is given before bedtime is the ________
a. independent variable. b. dependent variable. c. control variable. d. extraneous variable.
Psychology
An echo usually stays in the sensory registers for __________
a. 1/4 of a second b. one second c. several seconds d. 40 seconds
Psychology