Which of the following is a normal skin resident?
A. Clostridium perfringens
B. Staphylococcus aureus
C. Streptococcus mutans
D. Staphylococcus epidermidis
Answer: D
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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?
A. sensory neuron B. motor neuron C. interneuron D. glial cell E. All of these choices are correct.
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
Nervous tissue provides movement and heat
a. true b. false
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?
A) dispersive allopatric speciation B) dispersive sympatric speciation C) vicariant allopatric speciation D) vicariant sympatric speciation