Multiple Choice
Carbon dioxide (CO₂) is _______.
A) removed from the atmosphere during photosynthesis
B) a source of carbon for autotrophs
C) returned to the atmosphere during respiration and fermentation
D) used by marine organisms to make limestone for their hard shells
E) All of the choices are correct.
Correct Answer:
Verified
Correct Answer:
Verified
Q1: The bacterium Thiobacillus secretes sulfuric acid into
Q3: How are the sulfur cycle and the
Q4: The total amount of water in the
Q5: The conversion of gaseous nitrogen (N2) to
Q6: Which of the following statements concerning metagenomic
Q6: Living or dead organisms that occupy an
Q7: There are very few viruses in aquatic
Q8: Consider a deep sea hydrothermal vent. Which
Q9: Organisms whose sole source of carbon for
Q10: The major group of organisms that fix