An adult male produces sperm continuously by meiotic division of cells lining what structure?
A. Malpighian tubules
B. Fallopian tubules
C. seminiferous tubules
D. epididymis tubules
E. vas deferens tubules
C. seminiferous tubules
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The specimen of choice for detecting tuberculous pulmonary mycobacterial disease is:
a. spontaneously produced sputum. b. gastric lavage. c. transtracheal aspiration. d. bronchoscopy.
Certain antimicrobials may be life-threatening
Indicate whether this statement is true or false.
Which of the following represents an early
stage in primary succession?
a. pine trees b. mosses and lichen of bare rock c. weedy annual plants in an open field d. climax species in succession e. fields of food crops
An ELISA for Hepatitis C has 95 percent sensitivity and 90 percent specificity. This means that the test
A) detects 95 percent of the true positive samples and has 10 percent false positive results. B) detects 5 percent of the true positive samples and has 90 percent false positive results. C) detects 90 percent of the true positive samples and has 5 percent false positive results. D) detects 95 percent of the true positive samples and has 90 percent false positive results. E) detects 5 percent of the true positive samples and has 10 percent false positive results.