What are the characteristics of two species with a distant evolutionary relationship?
A. Few similarities between their proteins
B. Almost similar protein sequences
C. Almost opposite protein sequences
D. No similarities in their protein sequences.
E. Missing amino acids in their sequences
Answer: A
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Exotoxins ______.
A. cause more damage than endotoxins B. are secreted by pathogenic organisms C. are bound to the cell wall of pathogenic organisms D. are host specific E. are bound to the membrane of pathogenic organisms
HEPA filters are used to remove microbes from
A. air. B. liquids. C. medical instruments. D. human tissues. E. All of the choices are correct.
Closely related or similar species are grouped into a single:a
class. b. phylum. c. order. d. genus e. family.
Chemotaxis refers to the ability to
A. move in response to light. B. move in response to a chemical. C. not move in response to a chemical. D. transport desired molecules into cell. E. None of the choices is correct.