This person is carrying hepatitis A and does not practice safety at their restaurant job. What type of epidemic may result?
A. Point-source epidemic
B. Common-source epidemic
C. Propagated epidemic
D. No epidemic because they are in the recovery phase.
B. Common-source epidemic
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The macromolecule found in the cell walls of all bacteria is
A. lipid A. B. teichoic acid. C. peptidoglycan. D. glycocalyx.
Reverse genetics is a process by which the functions of particular genes are worked out by disabling them. What process is used to knock out a gene or alter its expression?
a. molecular cloning b. genetic mapping c. gene targeting d. linkage analysis
Which of the following represents the male gametophyte of a conifer?
A) pollen grain B) sperm C) pollen cone D) tree
__________ are needed in the diet as components of teeth and bone, as parts of certain enzymes, for normal muscle and nerve function, and for water balance.
a. Starches b. Fats c. Minerals d. Nucleic acids e. Vitamins