Warning: Use of undefined constant referer - assumed 'referer' (this will throw an Error in a future version of PHP) in /usr/home/essaywo/public_html/essays on line 102

Warning: Use of undefined constant host - assumed 'host' (this will throw an Error in a future version of PHP) in /usr/home/essaywo/public_html/essays on line 105

Warning: Cannot modify header information - headers already sent by (output started at /usr/home/essaywo/public_html/essays:102) in /usr/home/essaywo/public_html/essays on line 106

Warning: Cannot modify header information - headers already sent by (output started at /usr/home/essaywo/public_html/essays:102) in /usr/home/essaywo/public_html/essays on line 109
Photoperiodism - Papers

Photoperiodism


Plants and animals in the temperate zones respond in different ways to
the amount of daylight in 24-hour periods. This response to day length is
called photo periodism. It controls many activities, among them is the
flowering of plants. The ability to respond to day length is linked to an
inner, light-sensitive circadian rhythm.

In the temperate zones, day lengths during the natural 24-hour cycle
vary with the seasons. In winter and spring, the period of light
lengthens; in summer and autumn, it shortens. Plants in these zones
undergo alternate 12-hour phases of light sensitivity. During one 12-hour
phase, decreasing exposure to light induces a short-day reaction. For
example, ...

Want to read the rest of this paper?
Join Essayworld today to view this entire essay
and over 50,000 other term papers

them to periods of artificial light.

Some scientists are not certain that the biological clock of any
organism is completely endogenous. They think that even under the most
constant of laboratory conditions living things are aware of the Earth's
rotation and that this has an effect on the wheelof their clocks. However,
many scientists believe that such factors are not essential to the
functioning of biological clocks.

Word Count: ...

Get instant access to over 50,000 essays.
Write better papers. Get better grades.


Already a member? Login


CITE THIS PAGE:

Photoperiodism. (2006, October 1). Retrieved March 18, 2024, from http://www.essayworld.com/essays/Photoperiodism/53244
"Photoperiodism." Essayworld.com. Essayworld.com, 1 Oct. 2006. Web. 18 Mar. 2024. <http://www.essayworld.com/essays/Photoperiodism/53244>
"Photoperiodism." Essayworld.com. October 1, 2006. Accessed March 18, 2024. http://www.essayworld.com/essays/Photoperiodism/53244.
"Photoperiodism." Essayworld.com. October 1, 2006. Accessed March 18, 2024. http://www.essayworld.com/essays/Photoperiodism/53244.
JOIN NOW
Join today and get instant access to this and 50,000+ other essays


PAPER DETAILS
Added: 10/1/2006 10:26:05 AM
Category: Science & Nature
Type: Free Paper
Words: 260
Pages: 1

Save | Report

SHARE THIS PAPER

SAVED ESSAYS
Save and find your favorite essays easier

SIMILAR ESSAYS
» Seasonal Affective Disorder
Copyright | Cancel | Contact Us

Copyright © 2024 Essayworld. All rights reserved