What organisms are important nitrogen fixers in aquatic ecosystems?
A) diatoms
B) cyanobacteria
C) algae
D) rhizobial fungi
E) symbiotic coral animals
Correct Answer:
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Q15: Annual net primary productivity
A) is equal on
Q16: Net productivity can be measured as
A) numbers
Q17: The giant interconnected global ecosystem is called
Q18: What is the current concentration of carbon
Q19: Stilling and Drake have conducted experiments about
Q21: If a forested area surrounding a stream
Q22: Which global elemental cycle is most heavily
Q23: What is a major source of naturally
Q24: Most evapotranspiration occurs from the sea.
Q25: Grasslands have a lower herbivore biomass than
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