When a few individuals colonize a distant locality and start a new population, the allele frequencies of the gene pool
may be different than those in the original population. This is known as ____.
a. the founder effect
b. a population bottleneck
c. genetic equilibrium
d. the Hardy—Weinberg principle
e. natural selection
ANSWER: a
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The wide variety of finches Darwin observed in the Galàpagos was thought provoking to him because they appeared to have descended from __________ population. Today we regard this as an example of ___________
A. the same; adaptive radiation B. more than one; convergent evolution C. the same; convergent evolution D. more than one; adaptive radiation
What is the difference between the function of DNA and the function of proteins?
A) DNA performs most cellular functions and proteins store information. B) DNA stores genetic information in the order of nucleotides and proteins store genetic information in the order of amino acids. C) DNA stores genetic information and proteins perform most cellular functions. D) DNA provides structure to the cell and proteins act as enzymes.
Age of onset for schizophrenia is
A) prenatal. B) birth. C) early childhood. D) early adulthood.
People with high cholesterol levels often take drugs in an attempt to lower their cholesterol levels. One such drug is Lipitor. How does this drug work?
A) It prevents cholesterol from the diet from being absorbed in the small intestine. B) It acts as a competitive inhibitor by binding to the active site of enzymes that normally produce cholesterol. C) It enhances the activity of enzymes that help break down cholesterol in the body. D) It increases the activation energy of enzymes needed to produce cholesterol.