Humans have disrupted the nitrogen cycle primarily by ____
a. irrigation
b. cutting down forests
c. using nitrogen-containing fertilizers
d. crop rotation
e. leaching
ANSWER: c
Biology & Microbiology
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Coccolithophorids are marine members of the brown algae
________________ Indicate whether the statement is true or false.
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Which one of these diseases IS communicable?
A) tetanus B) plague C) streptococcal sore throat D) botulism
Biology & Microbiology
Microevolution describes the evolution of populations, while speciation describes the emergence of new species over long periods of time.
a. true b. false
Biology & Microbiology
Select all of the statements that illustrate advantages of live, attenuated vaccines. Select All That Apply
What will be an ideal response?
Biology & Microbiology