______ are individuals who inconspicuously shelter a pathogen and spread it to others.

A) Vectors
B) Sources
C) Opportunists
D) Carriers


Ans: D) Carriers

Biology & Microbiology

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What process does NOT produce variation?

a. crossing over b. random alignment of chromosomes during meiosis c. mitosis d. genetic recombination of alleles e. sexual reproduction

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Some biologists believe that the process of endosymbiosis was responsible for the evolution of 

A. eukaryotic cells. B. viruses. C. prokaryotic cells. D. fungi.

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Translation occurs at the ________ in the cell

Fill in the blank(s) with correct word

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What is the most common disease caused by Propionibacterium?

A) acne B) food poisoning C) pneumonitis D) folliculitis E) a sty

Biology & Microbiology