What mechanism did Charles Darwin discover as the driving force behind evolution?
A) the inheritance of acquired characteristics B) natural selection
C) artificial selection D) common descent with modification
Answer: B
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Graded potentials are particularly important for conveying stimulus intensity in
A. sensory neurons. B. motor neurons. C. interneurons. D. skeletal muscle cells. E. Schwann cells.
You measure the amount of enzyme activity in the presence of compound X and note that as you add more substrate the amount of enzyme activity increases. This indicates that the compound X is an __________.
A. non-competitive inhibitor B. competitive inhibitor C. activator D. allosteric inhibitor E. enzyme
In many species, lens crystalline protein aggregates in the eyes to form lenses, yet in other cell types, functions as an enzyme. The gene that encodes this protein is therefore
A) pleiotropic. B) incompletely penetrant. C) eclectic. D) mutant.
Which of the following are used as antibiotics?
a. secondary metabolites of fungi b. bodies of lichens c. systemic mycoses d. fungal pathogens