Which of the following criteria is most useful in

28) Which of the following criteria is most useful in determining whether two organisms are related? 28)
A) Both ferment lactose.
B) Both are motile.
C) Both are gram - positive.
D) Both are aerobic.
E) Each answer is equally important.
Answer: C
Explanation: A)
B)
C)
D)
E)
29) Organism A has 70 moles % G + C, and organism B has 40 moles % G + C. Which of the following can
be concluded from these data?
29)
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30) Biochemical tests are used to determine 30)
Explanation: A)
B)
C)
D)
E)
31) Data collected to date indicate that 31)
A) new species of bacteria may be discovered in wild animals.
B) marine mammals don't have an immune system.
C) marine mammals do not get infectious diseases.
D) humans and marine mammals cannot be infected by the same pathogens.
E) None of the answers is correct.
Answer: E
Explanation: A)
B)
C)
D)
E)
32) All of the following statements are reasons why fluorescent in situ hybridization (FISH) has become
a valuable tool for environmental microbiologists EXCEPT
32)
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33) Which of the following best defines a strain? 33)
A) a population of cells with similar characteristics
B) a group of organisms with a limited geographical distribution
C) same as a species
D) a pure culture that is not totally identical to other cultures of the same species
E) a group of cells derived from a single parent
Answer: D
Explanation: A)
B)
C)
D)
E)
34) Protists are a diverse group of organisms that are similar in 34)
Explanation: A)
B)
C)
D)
E)
35) Into which group would you place a multicellular heterotroph with chitin cell walls? 35)
36) Fossil evidence indicates that prokaryotic cells first existed on the Earth 36)
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