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Soil communities are dependent on plants for organic matter. Plants provide organic matter for soil communities through the deco
Soil communities are dependent on plants for organic matter. Plants provide organic matter for soil communities through the deco
admin
2020-09-28
28
问题
Soil communities are dependent on plants for organic matter. Plants provide organic matter for soil communities through the decomposition of leaf litter, by oozing nutrients from roots, or through other methods of deposition of organic compounds into the soil environments. As a result of these diverse methods by which plants supply resources, unique soil communities form under different plant species and under plant communities that differ in composition. If a nonnative plant species invades an above-ground community of flora and fauna, it can alter links between the native above-ground community and the below-ground soil community. For example, an invading nonnative plant could alter the quantity of leaf litter production, which would alter nutrient contributions to the soil.
According to the passage, plants supply resources to soil communities by which of the following methods?
选项
A、Some plants supply resources to soil communities by promoting diversity of above-ground flora and fauna.
B、Some plants supply resources to soil communities by oozing nutrients from their roots.
C、Some plants supply resources to soil communities by depositing leaf litter.
答案
B,C
解析
植物给土壤提供资源的方式可以定位在第二句,选项B、C均可在这句话中找到对应。A项文中未提及。
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本试题收录于:
GRE VERBAL题库GRE分类
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GRE VERBAL
GRE
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