What kind of entity is a lichen?
A) an association between a fungus and a brown alga
B) an association between a multicellular protist related to the brown algae and a bacterium
C) an association between a fungus and cyanobacteria or green algae
D) an association between a bryophyte and a fungus
Answer: C
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A disease that is transferred by direct intimate contact with a mortality rate over 90% would be an effective biological weapon
Indicate whether the statement is true or false.
Public health surveillance is the proactive evaluation of
A. emerging infectious agents. B. environmental conditions. C. human behaviors and lifestyle choices. D. genetic background. E. All of the choices are correct.
What do biologists use in order to identify
clones that contain the DNA fragment of interest?
a. probes b. plasmids c. templates d. primers e. ligases
Which statement about gene mutations is FALSE?
a. All mutations are transmitted to the next generation. b. Mutations are rare but their rates can be predicted. c. Mutations with beneficial effects will be favored by natural selection. d. Many mutations reduce an individual's chance of surviving and reproducing. e. Mutations with neutral effects neither help nor hurt the individual.