1. A microbe is commonly defined as a(n) ________ that requires a microscope to be seen.
a) eye of a fruit fly
b) virus
c) archaea
d) bacterium
e) single-cellular prokaryote
2. Which one of the following statements regarding microbial cells is FALSE?
a) Viruses are not considered microbial cells.
b) Most single-celled organisms require a microscope to render them visible, but some bacterial cells are large enough to be seen with the naked eye.
c) Microbes evolve at slow rates.
d) Many microbes form complex multicellular assemblages.
e) Microbial cells acquire food, gain energy to build themselves, and respond to environmental change.
3. Which of the following statements regarding viruses is FALSE?
a) They are "filterable agents" that can pass through porcelain filters that have a pore size that blocks microbes.
b) Some viral particles, when pure enough, can be crystallized.
c) Most are too small to be seen by a light microscope.
d) They were discovered by Wendell Stanley.
e) Their genomes could be composed of DNA or RNA.