In primary production:
A) carbon dioxide is released into the water.
B) oxygen is utilized by plants.
C) oxygen utilized by animals is less than the oxygen consumed by autotrophs.
D) proteins are made by animals.
E) there is a net gain in organic carbon by organisms.
Correct Answer:
Verified
Q34: The amount of carbon dioxide concentrations and
Q35: Energy flow in photosynthetic marine ecosystems is
Q36: Marine algae that grow close to the
Q37: Net primary productivity can be estimated as
Q38: The group of marine macroscopic algae with
Q40: The distinction between a food chain and
Q41: The most abundant marine macroscopic algae are
Q42: Productivity in polar oceans is:
A)light-limited.
B)nutrient-limited.
C)oxygen-limited.
D)light and nutrient-limited.
E)nutrient
Q43: The percentage of biomass regularly decomposed within
Q44: Nutrient flow in an ecosystem is:
A)bi-directional.
B)cyclical.
C)semi-conservative.
D)top down.
E)unidirectional.
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