What is the key concept for this section Define anddistinguish between a food chain and
Chapter 3, Problem 7(choose chapter or problem)
What is the key concept for this section? Define anddistinguish between a food chain and a food web.Explain what happens to energy as it flows throughfood chains and food webs. What is a pyramid ofenergy flow? Distinguish between gross primaryproductivity (GPP) and net primary productivity(NPP), and explain their importance. What arethe two most productive land ecosystems and thetwo most productive aquatic ecosystems? What percentageof the worlds NPP do humans use?
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