What does the term theory mean to a scientist?
A. A proposed explanation for an observed phenomenon
B. A hypothesis that has been supported by a large number of experiments
C. A hypothesis that has been supported by the evidence of one experiment
D. A guess
Answer: B
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Which of the following bacteria lack a cell wall?
A. Treponema pallidum B. Mycobacterium tuberculosis C. Staphylococcus aureus D. Mycoplasma pneumoniae
DNA contains an organism's genetic material, organized into sequences called:
a. genes. b. chromosomes. c. gametes. d. nuclei. e. sperm and egg cells.
In a population that is in Hardy-Weinberg
equilibrium, the frequency of the recessive homozygous genotype is 0.49. The percentage of the population that is heterozygous is a. 51. b. 49. c. 42. d. 7. e. 3.
Two genes located on the same chromosome are
A. homologous. B. homozygous. C. linked. D. autosomes.