The Following Questions Refer to the Description Below

question 54

Multiple Choice

The following questions refer to the description below.
A lichen is a mutualistic association between a fungus and a green algae or cyanobacteria. There are clear morphological differences in lichen body form; some have flat bodies and are very close together, others have leaf-like bodies, and still others grow upright. The association between the two organisms is so complete that lichens are classified as a single organism.
-Lichens are found in a wide variety of habitats, including rocks, soil, tree bark, buildings, etc. Aging of lichens has shown that some are thousands of years old; how is this possible when you see that some of these lichens are very small?

• A)When resources such as water is not available, the lichens enter a potentially long dormant phase, and thus grow very slowly.
• B)It is not possible, and is likely an error in the dating technique.
• C)It is not possible because small organisms are not long-lived.
• D)They can die off if air pollution is bad and then revive and continue growing.
• E)They can live long if they are in a city and protected from extreme cold and wind.

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