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  3. Virtually all plant and animal species on Earth can be found in tropical rainfor

Virtually all plant and animal species on Earth can be found in tropical rainfor

游客2023-09-16  33
问题 Virtually all plant and animal species on Earth can be found in tropical rainforests. [br] Plant species are dispersed over a large area with the help of______.
选项
答案 insects and birds
解析 由题意和题干中的dispersed定位到第四个小标题下第2段后3句The insects move from plant up the plants’ seeds…helps to disperse the population of the plant species over a larger area和第3段首句The numerous birds of the rainforest also play a major part in seed dispersal．此处需要填入名词性成分。第4个小标题下第2段后3句说明了昆虫是如何帮助植物传播种子的；第3段首句说明鸟类也能帮助传播种子。故答案为insects and birds。
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