Archived posting to the Leica Users Group, 2002/09/22
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]That's how science works...something is the truth, the whole truth, and nothing but the truth until we decide something else is actually the truth. JLS At 10:43 PM 9/21/2002 -0600, you wrote: >Actually they do not know how a tree gets water from the roots all the way >up. There are two main theories of which transpiration is currently in >vogue. Transpiration is supposed to be the engine that "sucks" the water >up. The other theory involves the roots pumping the water up. However >there is no actual proof either way and it would not surprise me to find >out we are wrong on both counts. At times it amazes me how much we do not >know about seemingly simple life forms we take for granted. > >John Collier > >On Saturday, September 21, 2002, at 04:36 PM, Jeffery Smith wrote: > >>"The tree sucked up water..." >> >>Oh dear. A biological and physical impossibility. You DO need to speak >>the Northwestern's resident botanist. The water is taken into the roots >>by osmosis, and then carried up the rest of the way through transpiration. > >-- >To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html