A healthy diet should include a variety of _____, which are plant-derived substances that may reduce the risk of disorders such as macular degeneration and heart disease
a. phytochemicals
b. vitamins
c. minerals
d. all of the choices
a
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What piece of the RNA HIV genome is used as a primer during the synthesis of double-stranded DNA from HIV RNA?
A. tRNA B. U3 C. gag D. PPT
Which of the following is not a characteristic of parenchyma cells?
a. They all lack the ability to photosynthesize. b. They can differentiate into other kinds of cells in response to an injury to the plant. c. They may contain various storage materials, such as starch grains, oils, or water. d. They must be living cells in order to function. e. They may secrete substances of various types.
The larger muscle fibers found in males account for the fact that males tend to be, on average, stronger than females
Indicate whether the statement is true or false
What feature of fats makes them hydrophobic?
A) Fats have carboxyl groups. B) Fats include one glycerol molecule. C) Fats have polar fatty acids. D) Fats have nonpolar hydrocarbon chains.