Which gas is increasing the most in the atmosphere and causing the biggest threat to the world by intensifying the greenhouse effect?
A) carbon dioxide
B) carbon monoxide
C) ozone
D) fluorocarbon
E) oxygen
Correct Answer:
Verified
Q16: Four of the five answers listed below
Q17: What is the major reservoir of phosphorus?
A)atmosphere
B)sedimentary
Q18: In ecosystems, primary consumers are _.
A)herbivores
B)carnivores
C)scavengers
D)decomposers
E)detritivores
Q19: How does phosphorus enter the biological portion
Q20: By the process called _, an organism's
Q22: Primary production is the _.
A)rate of photosynthesis
B)rate
Q23: Producers take up _ from the atmosphere
Q24: Producers are present at which trophic level?
A)first
B)second
C)third
D)fourth
Q25: The bottom or base of an energy
Q26: Detritus specifically includes _.
A)exclusively organic wastes
B)exclusively toxic
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