2006-11-04 09:59:49 · 8 answers · asked by mary l 1 in Science & Mathematics ➔ Botany
Leaves fall from trees in the autumn to protect the plant from the harsh environmental conditions of the winter, primarily the cold temperatures. By dropping their leaves the plants are able to seal off their internal tissues, that contain water, from the outside environment and this prevents the water in the plant tissues from freezing in the cold winter.
2006-11-04 10:04:41 · answer #1 · answered by mg 3 · 0⤊ 0⤋
photosynthesis takes place in the leaves. water is a waste product of photosynthesis. therefore, the trees lose their leaves so water cannot be lost.
2006-11-04 18:09:56 · answer #2 · answered by michelle 3 · 0⤊ 0⤋
To conserve water.
2006-11-04 18:59:40 · answer #3 · answered by moosa 5 · 0⤊ 0⤋
i think its because the tree is conserving all its water and nutrients in its trunk for the winter.
2006-11-04 18:03:34 · answer #4 · answered by ? 2 · 1⤊ 0⤋
Wind and weather.
2006-11-04 18:07:18 · answer #5 · answered by jeff 4 · 0⤊ 0⤋
because the leaves are dying...i think. :P
2006-11-04 18:07:51 · answer #6 · answered by forest lover 2 · 0⤊ 0⤋
Because they are old and dried up
2006-11-04 18:02:57 · answer #7 · answered by Jude M 2 · 0⤊ 1⤋
gravity
2006-11-04 18:07:29 · answer #8 · answered by C. S 4 · 0⤊ 1⤋