More than two-thirds of people infected with HIV in the world live in the ________ region of Africa, and the ________ are more commonly infected than ________
a. Saharan / men / women
b. Saharan / women / men
c. sub-Saharan / men / women
d. sub-Saharan / women / men
Answer: D
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The French taxonomist who, in 1809, proposed the first testable evolutionary theory that organisms using body parts repeatedly would increase their abilities was
A. Jean Baptiste Lamarck. B. Georges-Louis Buffon. C. Charles Darwin. D. James Hutton. E. Charles Lyell.
DNA is more stable than RNA for storing genetic information because ____
a. uracil needed for RNA synthesis is far less common than thymine needed for DNA synthesis b. RNA breaks more easily and accumulates more mutations than DNA does c. DNA is easier to build from its component molecules d. DNA requires less energy to construct than RNA does e. RNA molecules are longer than DNA molecules and thus more prone to breakage
The occipital lobe of the brain is responsible for
a. coordination of hands and fingers. b. speech. c. memory. d. the senses of taste and smell. e. vision.
Junctions between adjacent epithelial cells that allow for some movement between cells so that tissues can stretch and bend are called gap junctions.
a. true b. false