Reading and answers the question:
Lichens are a unique group of complex, flowerless plants growing on1. Which of the following is not true?
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.
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
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.
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?