After meiosis, what process restores the chromosome number in diploid individuals?
A. Spermatogenesis
B. Transcription
C. Fertilization
D. Oogenesis
E. Gametogenesis
Answer: C
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Viruses contain DNA or RNA, but lack genes necessary for metabolism and reproduction. Why are viruses not considered to be alive?
A. Viruses are unable to reproduce independently of a host. B. Viruses do not have the ability to evolve in their environment. C. Viruses do not contain internal organelles. D. Viruses do not contain nucleic acids.
Which of the following statements are true about enzymes, except:
Which of the following products can be found in maternal milk? a. Toxins b. Antibodies c. Alcohol d. All of these choices
e. Drugs
You are studying the synthesis of Molecule X in prokaryotes when you make the following observations: • When Molecule X is present in the prokaryotes’ environment, synthesis does not occur. • Molecule X synthesis increases when Molecule Z is present in the cell. • Molecule Z is never found outside of prokaryotic cells. Which statement can be supported by your observations?
a. Molecule Z is a repressor b. Molecule Z is an inducer c. Molecule Z is an activator d. Molecule Z is an operon