This site is not maintained. Click here for the new website of Richard Dawkins.

Comment

← The Eyes of Richard Dawkins

DavidMcC's Avatar Jump to comment 22 by DavidMcC

Comment 21 by Jussie

How the plants know where the sun is? Do they feel the heat or do they sense the light?

Jussie, it's quite simple. The rate of elongation of a stem is reduced by incident light. The plant does not have to form an image of where the sun is, the light just bends its stems automatically. This has long been known.

Mon, 03 Oct 2011 12:23:00 UTC | #877376