Which of the following play a role in the diagnosis of syphilis?
A. Dark-field examination of lesion fluids
B. Clinical history
C. Immunofluorescence examination of lesion fluids
D. All of the choices are correct.
Answer: D
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To increase the chance of detecting carcinogens in the Ames test, the test substance is treated with
A. penicillin. B. heat. C. ground-up rat liver. D. reverse transcriptase. E. penicillin AND heat.
Which of the following is associated with the phylum Annelida?
a. radial symmetry b. ctenidia c. chaetae d. radula
Suppose two living plant cells are in contact with each other so that water, but not solutes, can pass
between them. The cells have the same water potential. One cell has ?P???0.3 MPa and ?S = ?0.5 MPa, while the other cell has ?S = ?0.3 MPa. What is the ?P of the second cell?
a. ?P = ?0.8 MPa b. ?P = 0 MPa c. ?P = 0.5 MPa d. ?P = 0.8 MPa e. ?P = 0.1 MPa
Refer to Figure 22-2. The common hominid ancestor would be found at the position labeled:a
13
b. 12
c. 11
d. 10
e. 9