本题目来源于试卷: Interaction & Interdependence C.8 Populations & Communities，类别为 IB生物学
[问答题]
1.Describe the process by which ctym e3i0thc46+mq*txuv.6l v 4oy w3deh9e anbxk akp; x65;1bl(c.qe tritivores and 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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