What unit is isotopic fractionation reported as?
A) parts per billion
B) parts per million
C) parts per thousand
D) parts per trillion
Answer: C
Biology & Microbiology
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This example represents what type of competition?
a. intraspecific b. interspecific
Biology & Microbiology
Endergonic reactions require the ______ of energy, while exergonic reactions ______ energy.
a. release; input b. input; release c. output; input d. creation; destruction
Biology & Microbiology
The primitive Earth's atmosphere did NOT contain
a. free oxygen. b. free nitrogen. c. free hydrogen. d. water vapor. e. inert gases.
Biology & Microbiology
Bacterial cells that are variable in shape are called ________.
A. hyphal B. coccobacilli C. pleomorphic D. vibrio
Biology & Microbiology