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Unformatted text preview: Compression wood forms when there is more growth in the lower side to compensate and straighten the stem. Tension wood forms when there is more growth on the upper side of the bend to "pull" the stem upright. Reaction Wood Many trees native to tropical regions that have a uniform climate, such as the tropical rain forests, may not have annual growth rings, and have a fairly uniform grain. Tropical trees that grow in areas with seasonal climates do have growth rings, although the seasons may be wet/dry rather than cold/warm...
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- Fall '09