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15. Which of the following habitats would most likely have a high proportion of species of plants that are in symbiotic association with nitrogen-fixing bacteria?
(A) anoxic soils such as fens and bogs
(B) agriculturally productive regions that have gone fallow
(C) nutrient-limiting soils such as wet tropical rain forests
(D) alpine coniferous forests


答案:C
難度: 適中

10
 【站僕】摩檸Morning:有沒有達人來解釋一下?
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15.Which of the following habitats would..-阿摩線上測驗