【托福阅读题型：Plant Life in Hawaii句子简化题】托福阅读中句子简化题是重要题型之一。根据托福阅读题型不同来进行专项练习，是短期提高托福阅读能力的有效方法。同学们需要多加练习哦!

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　　托福阅读句子简化题：Plant Life in Hawaii

　　【Paragraph 2】Spores light enough to float on the breezes were carried thousands of miles from more ancient　lands and deposited at random across the bare mountain flanks. A few of these spores found a toehold on the dark,　forbidding rocks and grew and began to work their transformation upon the land. Lichens were probably the first　successful flora. These are not single individual plants; each one is a symbiotic combination of an alga and a fungus. The　algae capture the sun's energy by photosynthesis and store it in organic molecules. The fungi absorb moisture and　mineral salts from the rocks, passing these on in waste products that nourish algae. It is significant that the earliest living　thing that built communities on these islands are examples of symbiosis, a phenomenon that depends upon the close　cooperation of two or more forms of life and a principle that is very important in island communities. (The Arrival of　Plant Life in Hawaii)

　　Which of the sentences below best expresses the essential information in the highlighted sentence in the　passage? Incorrect choices change the meaning in important ways or leave out essential information.

　　○Some of the earliest important examples of symbiosis—the close cooperation of two or more living things—occur in island communities.

　　○Symbiosis—the close cooperation of pairs or small groups of living organisms—is especially important in these　island environments.

　　○The first organisms on these islands worked together closely in a relationship known as symbiosis, which isparticularly important on islands.

　　○It is significant to note that organisms in the beginning stages of the development of island life cannot survive　without close cooperation.

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