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Sieve

sieve

1. A utensil for separating the finer and coarser parts of a pulverized or granulated substance from each other. It consist of a vessel, usually shallow, with the bottom perforated, or made of hair, wire, or the like, woven in meshes. In a sieve thrown and sifted.

2. A kind of coarse basket.

(Science: botany) Sieve cells, cribriform cells. See Cribriform.

Origin: OE. Sive, AS. Sife; akin to D. Zeef, zift, OHG. Sib, G. Sieb. A. Cf. Sift.


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A cry for help in terms of the IBO

... cause random collisions to occur more frequently-most likely but still not sure d.They bring reactants into contact with each other. 2.What are sieve tubes? 3.what is the main carbohydrate translocated in the sieve tubes of a flowering plant 4.what is a lignified wall and how does it prevent ...

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by asecond
Sat Jul 12, 2008 4:12 am
 
Forum: Cell Biology
Topic: A cry for help in terms of the IBO
Replies: 2
Views: 565

Is There A Living Thing With NO CELLS?

about the nails, i think we came to a similar conclusion a while back. About the RBC and sieve tube element, I guess I said all I have to say. If you don't consider them alive, then we'll agree to disagree. BTW, could platelets do as a dead functioning cell? Cause they ...

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by MrMistery
Tue Mar 04, 2008 10:25 am
 
Forum: General Discussion
Topic: Is There A Living Thing With NO CELLS?
Replies: 33
Views: 1770

Is There A Living Thing With NO CELLS?

... corrected on the hair and nail stuff. On the issue of RBCs, I am still not clear where the RBC gets its enzymes from to carry out metabolism. Your sieve tube element (I will have to look this one up) sounds like a person being kept alive on a ventilator and being fed artificially. Turn the ventilator ...

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by genovese
Tue Mar 04, 2008 7:10 am
 
Forum: General Discussion
Topic: Is There A Living Thing With NO CELLS?
Replies: 33
Views: 1770

Is There A Living Thing With NO CELLS?

Genetic material is a prerequisite of life, but a cell can nevertheless be alive without genetic material. Take the case of a sieve tube element if you don't like RBC: the adjacent cell gives it all the proteins needed to survive for a long time and carry out all the functions it needs, ...

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by MrMistery
Mon Mar 03, 2008 5:10 pm
 
Forum: General Discussion
Topic: Is There A Living Thing With NO CELLS?
Replies: 33
Views: 1770

Is There A Living Thing With NO CELLS?

... Plant cells that die, like those in cork? Botanists still call them cells, but if you ask me, they are simply leftover walls. Or maybe a RBC or a sieve tube element? If you ask me they are still alive... I don't think your question has an answer either

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by MrMistery
Sat Mar 01, 2008 7:49 pm
 
Forum: General Discussion
Topic: Is There A Living Thing With NO CELLS?
Replies: 33
Views: 1770
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