Which of the following is a normal skin resident?

A. Clostridium perfringens
B. Staphylococcus aureus
C. Streptococcus mutans
D. Staphylococcus epidermidis


Answer: D

Biology & Microbiology

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What type of neuron is responsible for carrying electrical signals AWAY from the CNS to elicit a response in the body?

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The chorion is produced from which primary tissue layer(s)?

a. ectoderm and endoderm b. ectoderm and mesoderm c. endoderm and mesoderm d. ectoderm only e. endoderm only

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Nervous tissue provides movement and heat

a. true b. false

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There are two closely related populations of squirrels living in the Grand Canyon area?one lives on the north rim, the other lives on the south rim. Speciation in these squirrels BEST fits which model?

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