A study of the physical characteristics and life cycle of the cactus demonstrates how it has been able to adapt to harsh environments successfully.
Encyclopedia Britannica, 331 N. LaSalle St., Chicago, IL 60610, Phone: (312)347-7159, Toll-free: 800-323-1229, Fax: (312)294-2104, URL: http://www.britannica.com
Available on VHS
Running time 14 minutes.
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