The Hardy-Weinberg law is useful for
A. determining the extent to which a sexually reproducing population is evolving.
B. predicting when genetic drift will occur in a sexually reproducing population.
C. determining when speciation will occur.
D. predicting when specific groups of organisms will become extinct.
E. determining if a patient has a genetic disease.
Answer: A
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An enzyme that cleaves internal phosphodiester bonds of a DNA molecule is a (n)
A. ligase. B. exonuclease. C. methylase. D. endonuclease.
What do the founder effect and the bottleneck effect have in common?
A. Both the founder effect and the bottleneck effect are examples of disruptive selection. B. Both the founder effect and the bottleneck effect are forms of genetic drift. C. Both the founder effect and the bottleneck effect result from an increase in gene flow. D. Both the founder effect and the bottleneck effect result from mutation.
Which of the following statements about a gram-negative cell wall is FALSE?
a. It maintains the shape of the cell b. It includes a thin layer of peptidoglycan c. It functions as an endotoxin d. It contains teichoic acid
Answer the following questions true (T) or false (F)
1. When two things happen at the same time, that correlation indicates one factor is causing the other. 2. Hospital microbiologists routinely test isolated pathogens for their susceptibility to commonly prescribed drugs in order to share these susceptibility rates with the healthcare team to help them make informed decisions about antibiotic therapies. 3. Robert Hooke refined earlier versions of the microscope and became the first to see bacteria.