Carbon dioxide (CO2) is
A) removed from the atmosphere during photosynthesis.
B) a source of carbon.
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
Q13: A group of organisms of the same
Q14: Life would not be possible without
A)autotrophs.
B)primary consumers.
C)secondary
Q16: Thiobacillus thiooxidans is found in an environmental
Q17: Why do all living things need phosphorus?
A)For
Q19: All of the following are abiotic factors,
Q20: The overall role that a species serves
Q21: The niche of an organism includes all
Q23: What is the source of CO2 released
Q24: Indicator bacteria are
A)coliforms.
B)gram-negative rods.
C)evidence of fecal contamination.
D)used
Q40: Which of the following water-borne pathogens are
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