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Countless numbers of seeds have very thick seed coats and because of this, it is sometimes difficult for them to germinate. These thick seed coats keep water out of the seed, so the embryo cannot get the water needed to activate its metabolism and start germinating. A good example of this is from the northern temperate zone is the Kentucky coffee tree whose seed coat is almost two millimeters thick. It holds its seed pods in the top of the tree all winter. The inside of the pod is fleshy and contains a lot of water.
Approximate Word count = 350 Approximate Pages = 1.4 (250 words per page double spaced)
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