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3. A Desert plants have evolved ways of conserving and efficiently using the water available to them. Some flowering desert plants are ephemeral; they live for a few days at most. Their seeds lie dormant in the soil, sometimes for years, until a soaking rain enables them to germinate and quickly bloom. Woody desert plants either have long root systems that reach deep water sources or have spreading shallow roots that are able to take up …

…northern hemisphere and to the northwest in the southern hemisphere. These are relatively mild, moist winds that tend to bring frequent cyclonic precipitation to all elevations along the west-facing side of continents. The precipitation is characterized by polar fronts, where cold air from the polar easterlies drives in under the warm, moist air of the westerlies, which, on cooling, drop their moisture. In winter this is the cause of most snowfall on continents. ------------------------------------------------------------------------ **Bibliography**