2007-12-04 04:07:26 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Botany
This is not a foolish question. Plants do eliminate some wastes but instead of eliminating to the exterior like animals do they secrete their metabolic wastes into their nonliving tissues or cavities within the plant. Plant cells have internal sacs called vacuoles that are used for storage including waste storage. So with plants is is called secretion rather than excretion for their nongaseous byproducts. The primary plant waste is oxygen and it is released as a gas through leaf stomata and stem lenticles. Beyond this they also secrete from 10 to 25% of their total carbohydrate product via their roots and the soil to attract symbiotic soil organisms. This their root carbohydrate exudate.
http://www.plantphysiol.org/cgi/content/full/132/1/44
http://books.google.com/books?id=kSWV3HJTHUgC&pg=PA376&lpg=PA376&dq=root+carbohydrate+exudates&source=web&ots=KDush0HTlR&sig=OkXTG8WApPQLi6gh_PVPmqxkMKo
Trees use the heart wood. As a tree matures the sapwood ages and becomes the heartwood with the addition of tannins and metabolic waste materials from the tree.
Some botanists also propose that leaves may also be repositories of annual wastes by trees. Plants have found ways of using these toxins to ward off herbivorous pests by depositing secondary metabolites in leaves to make them unpalatable or harmful. They may also secrete them in the soil to prevent other plants from growing nearby. Allelopathy.http://www.biologie.uni-hamburg.de/b-online/e20/20.htm
2007-12-04 08:05:51 · answer #1 · answered by gardengallivant 7 · 0⤊ 0⤋
what do you think with all this water they get all the time.. And BUY the way
Blond medical terminology
Artery -- Study of paintings
Bacteria -- Back door of cafeteria
Barium -- What doctors do when treatment fails
2007-12-04 12:12:02 · answer #2 · answered by ILMW 2 · 0⤊ 2⤋
DUH....what do you think that water is every moring when you wake up that is on grass....some people are so stupid
2007-12-04 12:11:23 · answer #3 · answered by grinderguy44 1 · 0⤊ 1⤋
what do you think? do they have a urinary system? no
2007-12-04 18:17:12 · answer #4 · answered by n1nol3 1 · 1⤊ 1⤋
um. no
2007-12-04 12:10:03 · answer #5 · answered by AvidCheeseEnjoyer 3 · 0⤊ 1⤋
how about poop?
2007-12-04 16:48:01 · answer #6 · answered by Bill 6 · 0⤊ 2⤋
no.
2007-12-04 12:23:17 · answer #7 · answered by dinky 2 · 0⤊ 0⤋
no.
2007-12-04 12:11:46 · answer #8 · answered by l0serface23 2 · 0⤊ 1⤋