What makes the tree alive.
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It takes in a gas called carbon dioxide from the air and gives off oxygen. When you breathe, you take in the oxygen given off by trees and other plants, and breathe out carbon dioxide. When fall comes and daytimes get shorter, a little corky layer grows where each leaf stem joins a tree branch.
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Answer:A tree is composed of cells which are the fundamental units of all LIFE.Cells are the building blocks of all forms of life.The different parts of the tree are made up of different types of cells which all perform different life fuctions.Some of the cells are living,while some are dead
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