Question 1: Deserts of the American Southwest_ Flora, Fauna & Adaptation Quiz

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Which prominent Southwest desert plant employs pleats along its stem as a mechanism to expand and contract, allowing it to absorb significant amounts of water when available?

Answer Explanation

The Saguaro cactus (Carnegiea gigantea), iconic to the Sonoran Desert, has a pleated surface that works like an accordion, allowing the stem to expand greatly to store water after rain and contract as it uses its reserves.

A. Ocotillo

B. Prickly Pear Cactus

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C. Saguaro Cactus

D. Creosote Bush

Which prominent Southwest desert plant employs pleats along its stem as a mechanism to expand and contract, allowing it to absorb significant amounts of water when available?

Answer Explanation

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