________ is defined as the change over time in the frequency with which specific genes occur within a breeding species.
A. Exaptation
B. Adaptation
C. Nature through nurture
D. Evolution
Answer: D
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One study found that there were 2 to 3 million adolescents working illegally. Middle-class teenagers were more likely to be employed. What were lower-income teenagers more likely to do?
A. Make more money. B. Work longer hours. C. Be truant from school. D. Gain higher self-esteem.
The inability to recognize the identity of an object visually is called visual
a. aphasia. b. apraxia. c. amnesia. d. agnosia. e. neglect.
Which of the following is one of the functions of the placenta during pregnancy?
a. triggering the division of the zygote b. preventing nutrients from reaching the embryo c. secreting testosterone when the embryo is male d. screening out some, but not all, harmful substances
Menstruation consists of
a. blood b. cervical mucus c. sloughed off endometrial tissue d. all of the above