Paleontologists have pieced together from fossils the evolution of the whale from:a
aquatic reptiles.
b. four-legged, land dwelling mammals.
c. sharks.
d. porpoises.
e. extinct aquatic birds.
B
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When testing the effectiveness of a new cleaning product, which sample would be more valid? a. 222 bacteria in the Petri dish b. None of the samples are valid
c. 14 bacteria in the Petri dish d. All samples are equally valid. e. 3 bacteria in the Petri dish
What does the term genetics mean?
What will be an ideal response?
The ________ method provides an estimate of the CFUs (colony-forming units) in a sample.
A. Coulter-counter B. viable plate-count C. streak-plate D. turbidity E. direct microscopic-count
How does a noncompetitive inhibitor limit an enzyme's activity?
A. A noncompetitive inhibitor binds to the active site of an enzyme. B. A noncompetitive inhibitor binds to the substrate, preventing it from binding to the enzyme. C. A noncompetitive inhibitor binds to a coenzyme or cofactor, preventing it from binding to the enzyme. D. A noncompetitive inhibitor binds to an allosteric site of the enzyme.