Cell walls are found in more than just plants. They are also found in bacteria, archaea, fungi, and algae.
A cell wall is a fairly rigid layer surrounding a cell, located external to the cell membrane, that provides the cell with structural support, protection, and a filtering mechanism. The cell wall also prevents over-expansion when water enters the cell. Animals and most protists do not have cell walls.
The cell wall is constructed from different materials dependent upon the species.
In plants, the cell wall is constructed primarily from a carbohydrate polymer called cellulose, and the cell wall can therefore also functions as a carbohydrate store for the cell.
In bacteria, peptidoglycan forms the cell wall.
Archaea have various chemical compositions, including glycoprotein S-layers, pseudopeptidoglycan, or polysaccharides.
Fungi possess cell walls of chitin, and algae typically possess walls constructed of glycoproteins and polysaccharides, however certain algal species may have a cell wall composed of silicic acid. Often, other accessory molecules are found anchored to the cell wall.
2007-03-17 21:52:21
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answer #1
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answered by elchistoso69 5
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Not only plants have cell walls however.
Ascomycota, a fungi phylum, also have cell walls. But typically the common answer is plants. Bacteria also have a cell wall however they are not organisms.
2007-03-18 04:11:48
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answer #2
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answered by Philosophical One 2
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Cell walls are only found in plant cells, thus only plants will have cell walls.
2007-03-18 04:06:17
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answer #3
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answered by rajo 2
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cell wall is present only in plant cell.
2007-03-18 04:08:56
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answer #4
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answered by Sportsboy Akash 1
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Plants
2007-03-18 04:06:37
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answer #5
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answered by ignoramus 7
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well....an organism is made of a cell. i don't think a cell can exist within another cell.
2007-03-18 04:12:13
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answer #6
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answered by vroom 1
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