A mantle and mantle cavity are present in _____.
a) class Oligochaeta
b) class Bivalvia
c) class Polychaeta
d) class Hirudinea
Answer: c) class Polychaeta
Biology & Microbiology
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The division of microbes termed the Firmicutes have a cell wall type best described as ________.
A. gram-negative B. gram-positive C. archaeal D. lacking a cell wall
Biology & Microbiology
Which stage(s) produce(s) the characteristic chills and fever of malaria?
a. A b. B c. C d. A and B e. B and C
Biology & Microbiology
The enzyme that HIV uses to copy its RNA into DNA is
A. RNA integrase. B. transcriptase. C. reverse transcriptase. D. DNA polymerase. E. RNA polymerase.
Biology & Microbiology
Epithelial cells serve as a barrier to prevent non-specific movement of chemicals from one side of the epithelium to the other side.
a. true b. false
Biology & Microbiology