Question

Give reasons to explain each of the following.
Mosses, lichens and algae are the only form of vegetation found here.
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Answer 1

Answer:

Algae, lichens, and mosses grow profusely on trunks, limbs, and twigs of many trees and shrubs. The cool, cloudy, wet weather in western Washington and Oregon is ideal for these organisms.

Algae are the simplest of green plants. They are present nearly everywhere and are numerous in almost any place that has sufficient moisture, such as on tree trunks and twigs, shrubs, soil, rocks, and walls, as well as in fresh and salt water. In large numbers, algae form the “scum” on ponds and wet areas of lawns.

Lichens have two components—a fungus and an alga living in association with one another to give the appearance of a single plant. Lichens grow on soil, on trunks and branches of trees and shrubs, and on rocks. Rarely are they found in water. Like the algae, lichens manufacture their own food. They occur in several forms, such as crusty gray, green, yellow, and white growths. Some are leaf-like, others resemble a tuft of horse hair hanging from the branches.

Mosses are green plants somewhat similar to algae except they have a complex structure that resembles stems and leaves. Because they contain chlorophyll, mosses can manufacture their own food. Mosses grow on soils, on tree trunks and branches, on rocks, and in water. Liverworts are closely related to the mosses and grow under similar conditions.

Answer 2

Explanation:

Mosses,lichens and algae are the only form of vegetation found here because the severe weather conditions do not support vegetation.It is difficult for some animals and plants to survive such a weather conditions.