Glands are formed from _____.
Fill in the blank(s) with the appropriate word(s).
epithelial tissue
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The rapid change in G6PD allele frequency and the correlation of this allele with areas of high rates of malaria suggests that ____ explains this change in G6PD allele frequency
a. genetic drift b. artificial selection c. X-linked inheritance d. the founder effect e. natural selection
The use of isotope decay to determine the age of rock samples that contain fossils is known as ____
a. fossilization decay b. fossilization dating c. biogeography d. plate tectonics e. radiometric dating
The pitch of sound is determined by the
A. number of sound waves. B. frequency of sound waves. C. intensity of sound waves. D. size of sound waves.
Antimicrobics effective against only gram-positive bacteria would be termed
A. synthetic drugs. B. antibiotics. C. broad-spectrum drugs. D. narrow-spectrum drugs. E. semisynthetic drugs.