TPO9阅读The Arrival of Plant Life in Hawall第2题 求解释 谢谢

mengdanUID: 2833797

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 things 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.

2. It can be inferred from paragraph 2 that the fungi in lichens benefit from their symbiotic relationship with algae in what way?
A.The algae help the fungi meet some of their energy needs.
B.The algae protect the fungi from the Sun's radiation.
C.The algae provide the fungi with greater space for absorbing water.
D.The fungi produce less waste in the presence of algae.

答案是A，我选的是D。根据The fungi absorb moisture and mineral salts from the rocks, passing these on in waste products that nourish algae.后半句得出，为什么不对。文章只说alage可以存储这些energy在organic molecules中，但是怎么知道这些energy可以被fungi利用呢？文中哪里有表述？

谢谢！

lz80521UID: 2756488

“These are not single individual plants; each one is a symbiotic combination of an alga and a fungus.”————1

“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. ”————2

2中第一句是algae的作用；第二句是fungi对algae的促进作用。

由于1中表述的是algae与fungi的共同作用，因此接下来文章也应该讲这个内容，而2中第二句是fungi对algae的作用，可推知第一句是algae对fungi的作用，选A。

不知楼主明白了吗。

mengdanUID: 2833797

也就是说其实2句中的第一句话暗含了algae对fungi的作用。我做题目的时候有这样想过，但是不确定自己想的对不对。呵呵，谢谢你哈

JoelJoelleUID: 3408380

过了这么多年我也要来顶一下， 因为我有一模一样得疑问，。，， 也谢谢楼上得解答