Which element is found as a component of
amino acids, proteins, chlorophyll, nucleic
acids, and coenzymes?
a. nitrogen
b. potassium
c. sulfur
d. phosphorus
e. magnesium
A
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What is host plant resistance?
A. Producing large quantities of seeds in some years. B. The ability to prevent herbivory through various defenses. C. A form of crypsis practiced by tropical rain forest plants. D. The secretion of chemicals that are toxic to competing plant species. E. The ability of plants to grow taller than their competitors.
Which of the following is not one of the things to watch for in a mole?
A. larger than 6 mm B. a solid color, usually brown C. asymmetry D. elevated above the skin surface E. irregular border
A gene can now be defined as:
a. a DNA sequence that carries information to produce a specific RNA or protein product. b. a DNA nucleotide sequence that carries information to produce a specific polypeptide. c. a DNA or RNA sequence that carries information to produce a single polypeptide. d. a DNA nucleotide sequence that carries information to produce an enzyme. e. a DNA or RNA sequence that carries information to produce a specific polypeptide.
Which of the following is an example of analytical epidemiology?
A) cross-sectional studies B) descriptive studies C) correlation studies D) observational studies E) case reports