Within any ecosystem,the two major food chains are the ________ food chain and the grazing food chain.
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Q9: A(n)_ chemical reaction must absorb energy in
Q10: Net primary productivity in an ecosystem increases
Q11: Q12: For photosynthesis and productivity to occur,a plant Q13: The _ law of thermodynamics states that Q15: Which of the following formulas are correct Q16: According to the first law of thermodynamics, Q17: _ primary productivity is the total rate Q18: A chemical reaction requires energy to proceed.This Q19: An ecologist studying productivity in a sample
A)chemical
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