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Reading comprehension -TOEFL- Lesson 62 (Đọc hiểu -TOEFL- Bài 62)

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Lichens are a unique group of complex, flowerless plants growing on rocks and trees. There are thousands of kinds of lichens, which come in a wide variety of colors. The are composed of algae and fungi which unite to satisfy the needs of the lichens.
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The autotrophic green algae produce all their own food through a process called photosynthesis and provide the lichen with nutritional elements. On the other hand, the heterotrophic fungus, which depends on other elements to provide its food, not only absorbs and stores water for 10 the plant, but also helps protect it. This union by which two dissimilar organisms live together is called "symbiosis."

This sharing enables lichens to resist the most adverse environmental conditions found on earth. They can be found in some very unlikely 15 places such as the polar ice caps as well as in tropical zone, in dry areas as well as in wet ones, on mountain peaks and along coastal areas.

The lichen's strong resistance to its hostile environment and its 20 ability to live in harmony with such environments is one example that humanity should consider in trying to solve its own problems.

1. Which of the following is not true?




2. What can be said about autotrophic plants and heterotrophic plants?




3. Which of the following conclusions could be made about lichens?




4. Which of the following directly relates to algae?





Grammar Easy Grammar Medium Grammar - Difficult
1->25 26->49 50->75 76->99 100->125 126->164
Ôn Tập Ngữ Pháp Phần 1 Ôn Tập Ngữ Pháp Phần 2