so that water and solutes can pass.
they allow the sucrose to enter in phloem.
Sieve plates are pores in the plant cell walls that facilitate transport of materials between two sieve tubes. from: http://en.wikipedia.org/wiki/Sieve_tube_element
Pits are small openings in the wall. Perforation plates are larger openings. A sieve plate looks similar to a sieve that is used in the kitchen. They all allow things to move across cell walls.
Nectar in a Sieve was created in 1954.
The cells having sieve like perforations in their cell walls present in phloem are the sieve tubes of the phloem.
the sieve plate is a filter for the water that enters the "Water Vascular System" in Echinoderms.
The size of the holes in a sieve depends on what is the the size of material to be allowed through the holes. A set of sieves (flour sieves, garden riddles, etc) will range from large holes to fine.
A number of a sieve means how far apart the holes are as in the wires are closer together so bigger items stay in the sieve and so on
A sieve is a kitchen tool. It is for say if i had pasta than i would put the cooked pasta in it and the waterwould drain out because the sieve has little holes in the bottom
they allow the sucrose to enter in phloem.
by flowing along with water through perforations in the sieve plate
Sieve plates are cross walls separating the cells in the phloem and have lots of minute pores. These cross-walls look like a sieve and so are called sieve plates. The holes in the sieve plates allows rapid flow of manufactured food substances through the sieve tubes.
A sieve is something that separates insoluble substances from a solution. In the kitchen, a sieve is meshed wire, with tiny holes in it to allow the water to pass through, but doesn't allow insoluble substances.To sieve (verb) means to sift or separate things.
You can't sepertate jam with raisins with a sieve because jam is lumpy so it will not fall through the sieve. But raisins are too, the holes in a sieve are to small for a raisis to fit through.
a 50 micron filter will have sieve holes of diameter 50microns... ie 0.00005m while a 25micron filter will have sieve holes of diameter 25miicrons=0.000025
No, rock salt, being larger in size than the holes in the sieve, will not go through the sieve. The sieve will only allow smaller particles or substances to pass through, while retaining larger ones.
You can do this with a sieve. Simply pour the mixture into a sieve, the water will drain through the tiny holes, whereas the rice will stay in the sieve because it is too large to go through the tiny holes.