GnRH-producing cells in the brains of male cichlids are larger in territorial individuals
Indicate whether the statement is true or false.
T
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Choose the pencil that has the lowest potential energy.
A. A pencil hitting the ground after falling from your desk B. A pencil on your desk C. A pencil falling from your desk D. A pencil laying on the ground
Bile contains salts, pigments, lipids and ____
a. enzymes b. bicarbonate c. cholesterol d. lipase e. hydrochloric acid
The disease osteoporosis involves loss of both mineral and organic components from bones. Factors that may contribute to the development of osteoporosis include
A. lack of calcium and vitamin D in the diet. B. excess fat in the diet. C. prolonged disuse of muscles. D. a history of extreme sport participation. E. a decline in estrogen following menopause in women.
Which is the smallest portion of a substance that retains the properties of an element?
a. atom b. compound c. ion d. molecule e. mixture