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A region of low participatation usally less than 25 cm [10]/year is called?
Desert
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20 to 25% of the land surface, many located between 15 degrees and 40 degrees latitude both north and south of the equator is called?
Distribution
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A sparse, widely spaced, small leaves to leafless, deep tap root, waxy coating, thorny, and pungent odor is called?
Desert vegitation characteristics
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Plants able to survive on small amounts of water is called?
Xerotypes
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Plants whic hsend roots down to the water table or capilary fringe to obtain water is called?
Phreatophytes
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Plants able to withstand salt concentrations and immersion in highly saline water is called?
Harlophytes
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Poorly developed, shallow in depth, absence of dark colored humus layer, alkaline salt and caliche deposit is called?
Desert soil characteristics
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A fan-shaped stream deposited at the base of a mountian is called?
Alluvinal fan
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A coalescing alluvinal fans is called?
Bajada
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A gently sloping erosional bedrock surface at the base of a hill or mountian, which may be covered by a thin veneer of alluvium is called?
Pediment
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An isolated, residual hill rising above a pediment is called?
Inselberg
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A dried-up lake bed consistinly of mud cracked silt and clay is called?
Playa
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A broad, flat-topped elevated land area, bounded at least in part by cliffs is called?
Plateau
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A broad, flat-topped hill bounded by cliffs and crapped with a resistant rock layer is called?
Mesa
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A narrow, flat-topped, pinnacle bounded by cliffs and crapped with a resistant rock layer is called?
Butte
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