An alteration occurs during the formation of a dikaryotic cell, such that it has twice the number of nuclei compared to a normal dikaryotic cell. Only the number of nuclei changes; the type of nuclei remains the same. This altered cell is most accurately described as having
A. two haploid nuclei.
B. two diploid nuclei.
C. four diploid nuclei
D. has four haploid nuclei.
E. two haploid nuclei and two diploid nuclei.
D. has four haploid nuclei.
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The doctor responsible for introducing the idea of hand washing before attending patients was
A. Klein. B. Semmelweis. C. Koch. D. Pasteur.
A probable sequence of the evolution of cells was
A. autotroph ® aerobic heterotroph ® anaerobic heterotroph. B. anaerobic heterotroph ® aerobic heterotroph ® autotroph. C. anaerobic heterotroph ® autotroph ® aerobic heterotroph. D. aerobic heterotroph ® autotroph ® anaerobic heterotroph.
Which of the following best describes the difference between autotrophs and photoautotrophs?
a. Autotrophs produce their own food, and photoautotrophs use the energy from light to covert CO2 into an organic form. b. Autotrophs do not produce their own food, and photoautotrophs do. c. Autotrophs produce their own food, and photoautotrophs do not. d. Autotrophs produce their own food, and photoautotrophs use the energy from chemicals to covert CO2 into an organic form.
If a researcher used Escherichia coli DNA polymerase instead of Thermus aquaticus DNA polymerase in the PCR procedure, what would be the result?
A) DNA replication would occur more slowly than normal. B) DNA replication would not occur at all. C) Many mistakes would occur. D) DNA replication would occur twice as fast as normal. E) DNA replication would stop after one cycle.