"Martin" wrote in message
...
On Thu, 12 Aug 2004 21:18:05 +0000 (UTC), "Franz Heymann"
wrote:


"Kay" wrote in message
...
snip
OK. That figures. So what is the mechanism for plants that fold
their
leaves at night, I wonder?

Can't help with that one.

simple ...
http://www-saps.plantsci.cam.ac.uk/records/rec117.htm
:-)

It sounds somewhat adcanced for school level, but maybe I'm behind the
times.
Nevertheless, it was a very interesting link.

Franz