
Vegetation is a general term for the plant life of a region; it refers to the ground cover provided by plants, and is, by far, the most abundant biotic element of the biosphere. The term vegetation does not, by itself, imply anything regarding species composition, life forms, structure, spatial extent or any other specific botanical or geographic characteristics. It is broader than the term flora which refers exclusively to species composition.
Perhaps the closest synonym is plant community, but vegetation can, and often does, refer to a wider range of spatial scales. Primeval redwood forests, coastal mangrove stands, sphagnum bogs, desert soil crusts, roadside weed patches, wheat fields, cultivated gardens and lawns; are all encompassed by the term vegetation.
http://www.brainpop.com/science/cellularlifeandgenetics/plantgrowth/
Describe what type of vegetation would exist in each of the five climate zones.