When do opportunistic pathogens tend to cause disease?
A) when the host is young
B) when the host didn't wash with soap
C) when the host is weakened
D) after the host is already infected with a different pathogen
E) when the host is old
Answer: C
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You notice that your houseplants are all growing toward the light from your window. This indicates that their stems display:
A. positive gravitropism. B. positive thermotropism. C. positive phototropism. D. negative phototropism. E. negative gravitropism.
Bacterial endospores usually function in
A. reproduction B. survival C. protein synthesis D. storage
The binding of an antigen to an antibody can result in Select one:
a. neutralization of the antigen. b. agglutination or precipitation. c. complement activation and opsonization. d. all of these. e. neutralization of the antigen and agglutination or precipitation only.
All Platyhelminthes are parasitic.
Answer the following statement true (T) or false (F)