Within any ecosystem, there are two major food chains: the ________ food chain and the grazing food chain.
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Q9: A(n)_ chemical reaction must absorb energy in
Q11: The net energy going into growth of
Q12: _ efficiency is the ratio of productivity
Q12: For photosynthesis and productivity to occur,a plant
Q14: Energy is assimilated by plants through the
Q16: Primary productivity is greatest under
A)low temperatures and
Q17: _ is the primary factor that limits
Q18: According to the first law of thermodynamics
A)chemical
Q19: _ net primary productivity is the ratio
Q20: The amount of accumulated organic matter found
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