When a certain form of a trait increases the fitness of the individual, this allele will tend to ____ over time
a. affect the function of vestigial structures
b. lead to extinction of the population
c. be eliminated from the population
d. decrease in frequency in the population
e. increase in frequency in the population
ANSWER: e
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The process of diffusion requires:
A. a concentration gradient. B. ATP energy. C. the random movement of molecules. D. transport proteins.
Which of the following statements about muscle contraction is false?
A. Actin and myosin filaments shorten during muscle contraction. B. Sarcomere length is variable in invertebrates, but uniform in vertebrates. C. Longer sarcomeres allow for a greater degree of shortening. D. Actin and myosin filaments overlap more when a muscle is contracted than when it is relaxed. E. Rapidly contracting muscles express myosin molecules that have higher rates of ATP hydrolysis.
Suppose that your father is heterozygous for sickle cell disease. Suppose also that you know your mom has two "good" alleles. What is the probability that you will have the disorder and/or carry the "bad" allele and be able to pass it on to your children?
a. 25% for you, and 25% for your children b. 0% for you, and a possibility of passing it on to your children c. 0% for you, and you do not need to worry about passing the "bad" allele on to your children d. 50% for you, and 50% for your children
An evolutionary advancement occurred when organisms became multicellular and acquired a division of labor.
a. true b. false