Productivity is the amount of carbon fixed by organisms through the synthesis of organic matter using energy derived from ________ and ________.
A) chemosynthesis,photosynthesis
B) chemosynthesis,hydrothermal
C) photosynthesis,hydrothermal
D) hydrothermal,available nutrients
E) none of these
Correct Answer:
Verified
Q16: Scientists infer that chemical weathering of crustal
Q17: Thermoclines in the ocean are best developed
Q18: Salinity in the ocean is highest in
Q19: The Atlantic Ocean is saltier than the
Q20: The average salinity of seawater is _.
A)0)01%
B)0)27%
C)3)5%
D)19.8%
E)30.0%
Q22: Hydrothermal vents provide a unique deep sea
Q23: Organisms that feed through a food web
Q24: What limits productivity in polar regions?
A)low temperatures
Q25: Most marine animals live near the surface
Q26: Fish most commonly live _.
A)in the deepest
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