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The
Prickly Pear
Cactus
Prickly pear cactus are found in all of
the deserts of the American Southwest. Most
prickly pears have large spines, actually modified leaves, on their
stems and vary in height from less than a foot to 6 or 7 feet.

The
Desert
Food
Chain
A food chain constitutes a complex network
of organisms, from plants to animals, through
which energy, derived from the sun, flows
in the form of organic matter and dissipates
in the form of waste heat.