The secretions of the sweat and sebaceous glands provide ________ to the microbiota
A. water
B. amino acids
C. lipids
D. All of the choices are correct.
D.
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Fossils and molecular techniques reveal that the closest ancient wolflike relatives of most modern dogs lived in ____
a. Asia b. Africa c. South America d. North America e. Europe
Gymnosperms (such as conifers) and angiosperms (such as lilies) differ in that only the angiosperms have
a. lignified transport tissues. b. leaves. c. seeds. d. fruits. e. swimming sperm.
. If the nucleotide sequence ACTGAG represents the sticky end of a DNA molecule, to what other sticky end sequence
would it base pair?
a. TGACTC b. UGACUC c. ACTGAG d. ACUGUG e. GAGTCA
Even though all people are exposed to potential carcinogens on a daily basis, we do not all develop cancer. Why?
a. The carcinogens only affect tumor suppressor genes. b. Human cells are resistant to carcinogens until we are approximately 50 years old. c. DNA repair mechanisms through pathways activated by tumor suppressor genes are able to correct some of the mutations that occur. d. Humans' oncogenes protect us from most of the carcinogens we are exposed to.