terça-feira, 16 de agosto de 2011

Adaptation and Survival

The plant I have adopted is a tree. The first great adaptation of trees is that they contain a trunk made of wood. Wood, which is a tough fiber, is used as support, allowing the plant to grow bigger and heavier. My tree's trunk is surrounded by a very thick bark that allows its survival in this environment. It's environment is the cerrado, characterized by the dry climate and due to this region is constantly prone to forest fires. The thick bark prevents the fire from burning the entire tree, and once the fire is over, the burnt bark falls off and a new thick bark is formed. 
Another property that is essential for the tree to survive in this region is it's long roots that must reach groundwater located deep into the soil. Without this groundwater, this plant would not be able to receive water since of the low precipitation rate in Brasilia. In order to conserve better the limited amount of water this plant receives, it has waxy leaves. 
What is perhaps the single most important adaptation of this tree, is the presence of seeds. Seeds can wisthand dryness and therefore they may remain dormant for sometime. And the seed dispersal contributes to the conservation of this species since it can be spread to several environments where they may eventually adapt.

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