Differentiated cells, such as fat cells, have acquired their specialized function and remain in:
A. S phase.
B. G1 phase.
C. G2 phase.
D. M phase.
E. G0 phase.
E
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Which of the following conditions accurately represent Muller's ratchet, in terms of the selective advantage of sexual reproduction?
A) Deleterious mutations accumulate in asexual populations, resulting in a significant genetic load. B) Sexual reproduction is selected because it reintroduces no-mutation genotypes that have been lost from the population. C) Linkage disequilibrium increases in populations by genetic drift because no-mutation multilocus genotypes are lost by chance. D) All of the above accurately represent the conditions of Muller's ratchet.
The morbidity rate is best defined as __________.
A) the number of individuals, relative to the population, affected by a particular disease in a period of time B) the decrease in death rate following effective vaccination C) the number of individuals, relative to the population, who have died as a result of a particular disease in a period of time D) the percentage of infectious diseases that are nationally percentage E) the immunization rate for notifiable diseases that can be prevented through vaccination programs
Why is photosynthesis considered an endergonic reaction?
A) Photosynthesis does not comply with the physical laws of the universe. B) Low-energy reactants are converted to high-energy products. C) Activation energy is not required. D) Sugar has less energy than does the sun. E) Protein catalysts are not needed.
Which of the following is produced by fermentation?
A) beef jerky B) pasteurized milk C) pepperoni D) mozzarella cheese E) pepperoni and mozzarella cheese