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QUESTION 11.Which of the following is the slowest to decompose?ProteinsSugarsLigninsCelluloseQUESTION 21.Which of the following nutrients is most closely linked to the energy cycle in ecosystems?QUESTION 31.An ecologist studying productivity in a sample of grasses measures gross primary productivity as 1000 kcal/m2/yr and autotrophic respiration as 100 kcal/m2/yr. Based on these calculations, the net primary productivity would beQUESTION 41.The rate of net primary productivity can be limited directly by the availability of ____________.QUESTION 51.Net primary productivity in an ecosystem increases as mean annual temperature ____________.and mean annual rainfall decreasesdecreases and mean annual rainfall increasesincreases and mean annual rainfall decreasesand mean annual rainfall increases
1.Match the answer to the question.____F____ is the process by which plants absorb a portion of their nutrients from senescing tissues to be stored and used for the production of new tissues.The breakdown of chemical bonds that were formed during the construction of plant and animal tissues is called ____L____.