What are protocells and why are they considered important to the evolution of life?
What will be an ideal response?
ANSWER: Protocells are the hypothesized precursors of cells that existed billions of years ago.
Protocells would have been organic molecules assembled into aggregates that became
bounded by lipid bilayer membranes. They are considered important because life depends on
chemical reactions occurring in a controlled and sequestered environment.
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The environment of human skin requires an adaptation for microbes that can tolerate moderately ________ conditions.
A. halophilic B. alkaline C. anaerobic D. thermophilic E. psychrophilic
The fluorochrome stain used to study a fungus is:
a. calcofluor white. b. acridine orange. c. auramine. d. immunofluorescence.
Which plant hormone has mostly inhibitory
effects? a. auxin b. gibberellin c. cytokinin d. abscisic acid e. ethylene
Energy output is indicated by
a. A. b. B. c. C. d. D. e. E.