Which feature of cancer cells is targeted by most forms of chemotherapy?
A) anchorage independence
B) cell division
C) invasiveness of surrounding tissues
D) metastasis
B
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In the heart of a reptile or amphibian, where would you expect to find oxygenated blood? Select all correct choices
A. in the right atrium B. in the left atrium C. mixed with de-oxygenated blood in a common ventricle D. mixed with de-oxygenated blood in the right ventricle E. Nowhere; oxygenated blood does not travel through the heart of these animals.
Tundra occurs at high elevations on mountains
Indicate whether the statement is true or false
Dentinogenesis imperfecta is a rare, autosomal, dominantly inherited disease of the teeth that occurs in about one in 8000 people. The teeth are somewhat brown in color, and the crowns wear down rapidly. Assume that a male with dentinogenesis imperfecta
and no family history of the disease marries a woman with normal teeth. What is the probability that their first child will have dentinogenesis imperfecta? A) 1/4 B) 1/8 C) 1/2 D) 100% E) 3/4
How are HIV virions rendered virulent?
A. the action of protease releases reverse transcriptase and capsomeres after the virion buds from the cell. B. they bud to the surface of the host cell. C. they use a chemokine receptor to remove gp120. D. they bind to smooth muscle cells. E. they contact the cytoplasmic membrane via gp41.