Monday, December 26, 2005

Why Christmas trees are not extinct



'Conifers such as Christmas trees suffer a severe plumbing problem. The "pipes" that carry water through firs, pines and other conifers are 10 times shorter than those in flowering trees. But a University of Utah study suggests why conifers not only survive but thrive: efficient microscopic valves let water flow through conifers about as easily as it flows through other trees.' More

0 Comments:

Post a Comment

<< Home