Approximately ________ of 12- to 15-year-olds report that they have engaged in oral sex at least once
A) 9 to 18%
B) 20 to 30%
C) 40 to 50%
D) 60 to 70%
A) 9 to 18%
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People who bear one dominant and one recessive gene for a trait are
a. going to automatically pass that characteristic on to their offspring. b. definitely going to develop that characteristic. c. called "carriers" of the recessive gene. d. not going to pass that characteristic on to their offspring.
Jorge has trouble sleeping at night because his leg muscles seem to twitch every 20 to 40 seconds, severely disturbing his sleep. His doctor diagnosed
a. REM behavior disorder. b. somnambulism. c. hypnic jerk syndrome. d. periodic limb movement syndrome.
When a young child discovers that simply changing the shape of an object does not necessarily change the amount of the object (e.g., a flattened ball of clay contains the same amount of clay as when it was rolled into a ball), the child is showing an understanding of
a. object permanence. b. accommodation. c. assimilation. d. conservation.
When participants are randomly assigned either to an experimental condition or to a control condition, this is called a __________ design
FIll in the blank with correct word.