Does stress during a woman's first trimester of a pregnancy affect the infant's birth weight? is a:
a. research question.
b. portion of a problem statement.
c. statement of purpose.
d. hypothesis.

Using a muscle's full range of motion will result in which of the following? a. muscle imbalance b. increased strength to the entire muscle c. the muscle not being strengthened d. reduced joint flexibility

Which food preservation method can people use at home? a. fermentation b. irradiation c. pasteurization d. thermal processing

Is psychology a science? use evidence form the article to explain you answer.