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Structures of plant hormones
Examine the role of sunlight and gravity in phototropic and geotropic plant growth
Discover
Small, white rat (genus Rattus) on a glass table. (rodent, laboratory, experiment)
Cruel and Unusual Punishments: 15 Types of Torture
Orange basketball on black background and with low key lighting. Homepage 2010, arts and entertainment, history and society
The 10 Greatest Basketball Players of All Time
Horses. Equus caballus. Horse stable. A brown horse looks out from his stall through the window.
Horsing Around: 7 of the Weirdest Racehorse Names in History
Remarkable new details of Pluto's largest moon Charon are revealed in this image from New Horizons' Long Range Reconnaissance Imager (LORRI), taken late on July 13, 2015 from a distance of 289,000 miles
Why Is Pluto No Longer a Planet?
earthquake. Heavily damaged school in the town of Yingxiu after a major earthquake struck China's Sichuan Province on May 12, 2008.
The 6 Deadliest Earthquakes Since 1950
Ice Sledge Hockey, Hockey Canada Cup, USA (left) vs Canada, 2009. UBC Thunderbird Arena, Vancouver, BC, competition site for Olympic ice hockey and Paralympic ice sledge hockey. Vancouver 2010 Olympic and Paralympic Winter Games, Vancouver Olympics
10 Best Hockey Players of All Time
In this aerial photo, structures are damaged and destroyed October 15, 2005 in Balakot, Pakistan. It is estimated that 90% of the city of Balakot was leveled by the earthquake. The death toll in the 7.6 magnitude earthquake that struck northern Pakistan on October 8, 2005 is believed to be 38,000 with at least 1,300 more dead in Indian Kashmir. SEE CONTENT NOTES.
6 of the World’s Deadliest Natural Disasters

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Videos

Examine the role of sunlight and gravity in phototropic and geotropic plant growth
Plants' stems grow in the direction of a light source (phototropism), whereas their...
Video: Encyclopædia Britannica, Inc.

Images

Structures of plant hormones
Some plant hormones, such as abscisic acid and gibberellin, have cyclic structures.
Encyclopædia Britannica, Inc.
VIEW MORE in these related Britannica articles: