Which of the following is true of spermarche?
A) Its onset varies considerably between different ethnic groups.
B) It typically occurs between 13 and 14 years of age, but the production of viable sperm does not happen until a few months later.
C) It typically occurs between 15 and 16 years of age.
D) Viable sperm production usually occurs a few months prior to the first ejaculation.
B
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Results of a longitudinal study suggest that __________ appears to be the peak time for interaction with peers online among adolescents.
A. early adolescence B. mid-adolescence C. late adolescence D. emerging adulthood
Which types of graphs are used for data from an interval scale?
a. Histograms and bar graphs c. Histograms and polygons b. Polygons and bar graphs d. Histograms, bar graphs, and polygons
Xenophobia is the fear of ____
a. strong women b. extraterrestrials c. strangers d. xylophones
In humans and some other primates, such as Bonobos, sexual behavior:
a. almost always is linked to reproduction b. is strictly regulated by female receptivity c. often occurs for reasons not directly related to reproduction d. rarely occurs for reasons of reproduction