Autosomal dominant genetic disorder that affects the nervous system; results in a progressive loss of neurons in the brain.
What will be an ideal response?
huntington disease
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The Cretaceous is the most recent period of the ____ era
a. Paleozoic b. Cenozoic c. Mesozoic d. Proterozoic e. Archaean
Aristotle believed that
A. all species are equal in complexity. B. living organisms can be arranged based on their order of increasing complexity. C. every species on Earth has a perfect or "essential" form. D. life originated from inorganic substances.
Temperature is perhaps the most important factor in the distribution of organisms because
A. water is more scarce in warmer environments. B. wind amplifies the effect of cool temperatures. C. most organisms are unable to regulate their body temperature precisely. D. the metabolic optimum for endothermic animals is in temperate areas. E. many organisms are able to grow faster in warmer climates.
Why don't sulfa drugs target mammalian cells?
A) Mammalian cells produce inhibitors to the sulfa drugs. B) Mammals make their own folic acid but use a completely different substrate to start the process and therefore sulfa drugs are unable to disrupt the process. C) Mammalian cells do not use folic acid and therefore do not have the enzyme that these drugs target. D) Sulfa drugs do target mammalian cells but the bacteria die so quickly that the patient experiences mild symptoms but can then stop taking the medication before experiencing any serious symptoms. E) Mammals do not make their own folic acid and therefore do not have the enzyme that these drugs target.