Plants are found in all climates from the coldest to the hottest - from the highest altitudes to the bottom of the deepest oceans. No matter what area of the world is studied, the landscape changes at different times of year and so do the sorts of organisms found there.

When a pond, a wood, a field or a garden is closely observed at different times of the year, changes can be observed in the plants (and animals) found there. In the middle of winter there seems to be very little life. Then, in the spring and the summer, the same places are teeming with life. Where does it all come from? Where did it go during the winter months? 

• How Plants Survive the Winter
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