本题目来源于试卷: Form and Function B.10 Ecological Niches，类别为 IB生物学
[问答题]
1.Describe the process by which7d4d stzx,;zkbx*i m g 97xxw4 detritivores any-h -((fsv lit5l cn a53pbv.jd saprotrophs obtain nutrition.
2.Describe how a quadrat can be used to estimate the population of poppies in a field.
3.Energy and nutrients move through ecosystems differently. Describe how energy and nutrients move through terrestrial ecosystems.
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