13th Annual Smithsonian.com Photo Contest
Instead of leaves, most cactus have spines or thorns which are nothing but modified leaves. These spines do not lose water through evaporation unlike regular leaves. Also, the spines protect the cactus from animals that would like to eat the cactus to obtain food and water.
© Jatinkumar Thakkar.
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||May 8, 2015, 12:49 p.m.