Ali is a thin 15-year-old. She is physically fit, involved in gymnastics and swimming. Why
would she not have experienced menarche yet?
a. Some girls are late bloomers, beginning menarche later than others
b. Involvement in athletics leads to disrupted primary sex characteristics
c. Lowered body fat often leads to delayed menarche
d. Stress, especially as a result of athletic competition, can delay menarche
c. Lowered body fat often leads to delayed menarche
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The biological system is a system.
A. complex and self-containing B. predictable and predetermined C. linear and static D. multilevel and dynamic
________, caused by a parasite harbored in the bodies of cattle, sheep, and pigs and in the intestinal tracts of cats, typically produces either no symptoms or symptoms like those of the common cold.
A. Hepatitis C B. Zika C. Rubella D. Toxoplasmosis
A significant difference between groups or conditions allows researchers to conclude that an effect exists in the population because they are able to reject the _________ in a significant test.
Fill in the blank(s) with the appropriate word(s).
Nina is 58 years old. She reached menopause 6 years ago and currently has very low estrogen levels. She is lean and has a body mass index (BMI) of 19. Nina is most likely to have:
A. hemophilia. B. rapid bone loss. C. high cholesterol levels. D. spina bifida.