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If it is made up of cells, but in close second is whether or not it can reproduce.
they are important in the nervous system they lead to chnages in sodium and calcium concentrations in cells they open or close in response to a chemical signal
At night or when there is no sunlight available.
carbondioxide
Chloroplasts of plants are most close in size to human cheek cells. They are estimated to be about three micrometers in terms of size.
Radiowaves are the lowest, with microwaves a close second in lowest frequency.
It can never be exactly zero, but it is close to 0.
If it is made up of cells, but in close second is whether or not it can reproduce.
they are important in the nervous system they lead to chnages in sodium and calcium concentrations in cells they open or close in response to a chemical signal
The guard cells of non desert plants simply contract a bit but do not close. Desert plants close their guard cells.
$1.37 as of market close on 9/26/08 lowest of the year... so far
guard cells
No Guard cells are cells that close when there is dry weather, preventing the leaf from becoming dehydrated
guard cells
the guard cells
There is nothing to say its important to close folders. You can keep them up when you like.
Stomatal pores in plants regulate the amount of water and solutes within them by opening and closing their guard cells using osmotic pressure. Guard cells and adjacent subsidiary cells are involved in opening and closing of stomata.