In a population with a q allele frequency of 0.6, what would the frequency of allele p be?
A) 0.6
B) 0.5
C) 0.36
D) 0.4
D
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Syphilis was once treated by intentionally infecting the patient with the parasite that causes malaria, a disease characterized by repeated bouts of fever, shaking, and chills
Why might this treatment cure syphilis? A. Malaria parasites produce strong antibacterial compounds (since they're eukaryotic in nature-they are trying to eliminate their competition for resources). This helps to eliminate ALL bacteria in and on the human body for a short period of time. B. Malaria parasites track down and feed upon ALL bacterial cells in the human body as a part of their life cycle. This makes them a "natural antibiotic" of sorts, and highly effective at clearing the bacterial infection of syphilis. C. One of the side effects of malarial infection is a massive overproduction of macrophages-so many that they become the dominant cell type in the blood (even over red blood cells!). This drives up the ability to ingest and destroy any microbe, including the bacterium that causes syphilis. D. The effect of driving up the body temperature for periods of time can shut down the temperature-sensitive replication of the bacterium that causes syphilis. This gives the immune system time to eliminate it properly.
Rebecca found out that she has a mass of dividing cells called a tumor in her ovaries. She has had tests and is returning to the doctor. Which of the following would be the best news that Rebecca could receive from her doctor?
A. It is a benign tumor. B. The cells are cancerous and are in situ. C. It is malignant ovarian cancer. D. The tumor has metastasized and invaded neighboring tissue. E. It is a malignant tumor.
In a scientific experiment, large sample sizes decrease _______ and a ________ allows a standard of comparison for the experimental group.
a. test, hypothesis b. credibility, sampling error c. sampling error, control group d. control group, sampling error e. none of the above
What is a Dane particle?
A) the chlorine-resistant virus that causes HAV B) the infectious virion that causes HBV C) the spherical particles found in serum of patients with HBV D) the filamentous particles that cause HAV E) another name for an HBV surface antigen