Gross primary productivity____.
A) is the energy available to the consumers in an ecosystem
B) does not vary among ecosystems
C) is the rate at which solar energy is captured in sugar molecules during photosynthesis
D) is the energy used only for metabolism and cellular respiration
When precipitation reaches Earth's surface, it may ______.
B) moves along the surface as runoff
C) percolate into the ground
D) A, B, and C
The total amount of photosynthesis that happens in a given system can be referred to as __________.
A) net primary production (NPP).
B) gross primary production (GPP).
C) net ecosystem exchange (NEE).
D) net autotrophy (NA).
The use of the standing biomass of primary producers to estimate NPP would be most problematical when _______.
A) the growth rate of primary producers is very rapid
B) primary producer tissues that die decompose rapidly
C) primary producer tissues are rapidly consumed by herbivores
D) A and B
E) B and C
Which statement is False?
A) Energy transfers between trophic levels are inefficient.
B) All of the individual organisms in a trophic will level get eaten by organisms in the next level up.
C) About 10% of the energy that is stored as biomass in one trophic level ends up stored as biomass in the next trophic level.
D) After a certain number of trophic levels there is too little energy flow to support a population at a higher level.
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