Do evergreens photosynthesize in winter?

Do evergreens photosynthesize in winter?
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1 Answer

Answer :

Wyatt B. from Hibbard Elementary in Rexburg asks: Why do evergreens stay green all year round? Answer… The reason evergreens stay green all year is not simple. Evergreen trees (trees that keep their leaves year-round instead of losing them all at once) originated in cold, northern climates. In the north, the growing season (spring/summer) is very short compared to that of the south. Trees use light to make food through photosynthesis. In order to survive in the shorter growing seasons, trees needed to gather light all year long. The only way to do this was to gather light for photosynthesis in the winter. (However, trees can only photosynthesize when water is available in a useful form, so when the only available water is snow or ice, even evergreen trees are dormant. They rest until conditions are right for photosynthesis to start again.) Full answer can be found at http://www.idahoforests.org/ask/trees/f_tf_17.htm?OpenScript=12858 :)
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