2006-09-11 04:01:22 · 12 answers · asked by sim 2 in Science & Mathematics ➔ Biology
some people say dot touch or disturb them during evening.
2006-09-11 04:32:06 · update #1
Actually to answer this we need to understand what is sleep... for animals it is like suspeding activities & lying down & stoping all physical functions & turn off the brain activity....
For plants....
They do no physical work...
They dont have brain...
But , yes they have two processes going on in them
Photosynthesis
Respiration
& at night when sun is set...
One of the process is stopped which i think is like going in to a supended mode becoz they only breathe & not make food...
So it is up to you wether u call it sleep or not.....
2006-09-11 04:08:41 · answer #1 · answered by Ashish Samadhia 3 · 1⤊ 0⤋
I wouldn't call it sleep, but most plants needs cycles of day and night (different plants/different season will have different requirements as far as the length of time of each part of the cycle). The plants are regulated by light and temperature, but mostly light. As I said I wouldn't call it sleep, but the plant reduces metabolism and change functions at night. Sleep for us, and I believe all animals, are essential for brain function, but also for the whole body to regenerate resupply essential enzymes, rest muscles and things like that. Plants have no brain but still require time to regenerate, rest and resupply so in a way it could have a function correspondent to sleep, and be named sleep maybe for lack of a better term (although I'm not sure if there isn't one).
2006-09-11 04:54:49 · answer #2 · answered by dahfna 3 · 0⤊ 0⤋
Poinsettias require at least eight hours of darkness in order to maintain the red color.
Tulips close up at night (when the fairies put their babies into them, or so I have been told, but I don't believe it).
So maybe plants do sleep.
Some plants are nocturnal and bloom at night but not during the day.
2006-09-11 04:09:57 · answer #3 · answered by GreenHornet 5 · 0⤊ 0⤋
You have to look at the definition of sleeping. So no. We always want to apply human characteristics to non-human animals or objects, or attribute animal behaviour to human habits, like laughter.
As a kid I used to wonder if cats and dogs knew when we were laughing at them. Unless they are capable of experiencing embarrassment, the answer is no. â¥
2006-09-11 04:09:08 · answer #4 · answered by ? 3 · 0⤊ 0⤋
Plants stop their cycle of photsynthesis when it is dark. Maybe this lull in activity could be construed as "sleep."
2006-09-11 04:04:12 · answer #5 · answered by c.arsenault 5 · 0⤊ 0⤋
They dont, never ever sleep.
During the day they photosynthesis
During the night they used oxigen just like human
2006-09-11 04:09:22 · answer #6 · answered by Anonymous · 0⤊ 0⤋
at night, they fold up and point down. at sunrise, they straighten and open up... but not sure i'd say they're sleeping. they just need sunlight to live
2006-09-11 04:04:28 · answer #7 · answered by tomiyo 4 · 1⤊ 0⤋
Some flowers close up when its dark.
2006-09-11 04:03:11 · answer #8 · answered by daisymay 5 · 0⤊ 0⤋
yes
2006-09-13 02:59:48 · answer #9 · answered by david w 5 · 0⤊ 0⤋
My plants speak. They say: SMOKE ME!
2006-09-11 04:03:47 · answer #10 · answered by King of Babylon 3 · 1⤊ 1⤋