Rigid bacteria with a helical cell shape are called
A. coccobacilli.
B. vibrios.
C. spirochetes.
D. spirilla.
Answer: D
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Mendel's success in formulating his fundamental principles of inheritance can be attributed to which of the following?
A. Mendel focused on the overall appearance of the plant rather than on individual traits. B. Mendel focused on individual traits of the plant rather than on the overall appearance. C. Mendel chose to study complex traits that result from interactions between multiple genes. D. Mendel used an organism that grew slowly, therefore having long generation times. E. Mendel used fruit flies to study inheritance.
Potable water
A. is not suitable for human consumption. B. requires boiling to make it safe to drink. C. is suitable for human consumption. D. requires chemical or biological treatment to remove heavy metals.
Two populations that have no gene flow between them are likely to
a. become more different with time. b. become more alike with time. c. become more alike if the directional selection pressures are different. d. stay the same unless mutations occur.
In random mating
A. breeding occurs between two different subspecies. B. breeding occurs between two different species. C. individuals choose the most attractive mate. D. fertile offspring are not produced. E. there is no factor influencing mate choice.