Four of the five answers listed below are types of selection exhibited by nature. Select the exception
a. artificial
b. disruptive
c. stabilizing
d. directional
e. sexual
a
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The ELISA test has been used as the most common, rapid screening test for HIV infection. Its sensitivity is very high but its specificity is rather low (for an important identification test). Which statement describes this accurately?
A. A false positive test result may develop due to the test antigens capturing normal antibodies. B. The patient's specimen has to be handled in a certain way to maintain the integrity of the viral DNA. C. The test can identify the patient's antibody to HIV only when it is large quantities. D. Only certain kinds of instruments can be used to pick up the small amounts of fluorescence given off in the ELISA.
Which of the following conditions is not known to be a cause of kidney failure?
a. exposure to lead, arsenic, or pesticides b. complications of diabetes c. high blood pressure d. fever from influenza
What is the order of the salamanders?
a. Anura b. Salientia c. Urodela d. Apoda
Chlorophyll molecules are embedded in the membranes of the ________
Fill in the blank(s) with the appropriate word(s).