Animation - Phytochrome Signaling McGraw-Hill Companies Animation with audio.

long-day plant A Dictionary of Ecology | 2004 MICHAEL ALLABY, Copyright Encyclopedia.com Visit the web site for the definition.

Mystery Solved: How Plants Know When to Flower By Robert Roy Britt, LiveScience Senior Writer 11 August 2005 Scientists have known since the 1930s that plants sense the length of the days and

Photoperiodism Biology Reference The term "photoperiodism" was coined to describe a plant's ability to flower in response to changes in the photoperiod: the relative lengths of day and night.

Photoperiodism - YouTube Posted by forensicked September 23, 2008 "A short video (10:24 minutes) about how plants respond to the seasons."

Photoreception: what are Phytochromes? Plant-Biology.com Plant photoreceptors are able to respond to visible light. There are three main classes of photoreceptors.... Visit the web site for t

Phytochrome Wikipedia.org Phytochrome is a photoreceptor, a pigment that plants use to detect light. It is sensitive to light in the red and far-red region of the visible spectrum. Visit the we

Plant Biology: Photoperiod response, photoperiodism "Photoperiod describes the duration of daylight in the daily cycle, and the term photoperiodism describes an organism's ability to detect changes

Spark Notes: Plants: Essential Processes-Photoperiodism Plants have a wide variety of flowering strategies involving what time of year they will flower and, consequently, reproduce. In many plant

The Open Door Web Site: IB Biology: Plant Physiology - Photoperiodism by Paul Billiet Two Powerpoint presentation, text, an d illustrations on photoperiodism which is the ability of a plant or a

What Is a Phytochrome? Written by Caitlin Kenney WiseGeek.com Phytochrome is a pigment found in most plants and some bacteria that is used to monitor the color of light. Visit the web site