Plants have biological clock for sun intake

From: The Milwaukee Journal Sentinel | Date: April 20, 2003| Author: EMILY GERSEMA | Copyright information

Plants have biological clock for sun intake, scientists say

By EMILY GERSEMA Associated Press

Sunday, April 20, 2003

Washington -- Plants appear still and silent, but inside a clock is ticking.

Scientists in Israel and the U.S. Agriculture Department have discovered that plants, like animals, have a 24-hour biological clock.

Like the body clock that tells humans to wake up, plants have one that tells them to prepare for the sun.

The plant clock is set ...

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