The_____ time is the time that lapses between the encounter with the pathogen and the first symptoms
a. Prodrome
b. Period of invasion
c. Period of convalescence
d. Period of incubation
Ans: d. Period of incubation
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Pieces of DNA that move from plasmid to chromosome or vice versa but are not found as separate entities are called:
a. DNA polymerases. b. transposable elements. c. plasmids. d. chromatoids.
Which of the following processes does NOT require the cell to spend energy?
a) endocytosis b) active transport c) facilitated transport d) endocytosis
Algal blooms often occur when which nutrients accumulate in the water?
A) Mercury and sulfur B) Potassium and sodium C) Copper and iron D) Phosphorous and nitrogen
Canning works to preserve foods through
A) creation of an anaerobic environment. B) creation of an anaerobic environment and exposure to high heat. C) exposure to high heat. D) mutation of bacterial DNA. E) increasing pH.