What are the  advantages or disadvantages of having a cell wall?
967427
Some pros\n\nCells with a cell wall are stronger \nCells can withtsand far greater degrees of positive osmotic pressure (higher concentrations of water outside of the cell).\nWhen cells die they can still serve a purpose within the organism by contributing to structural rigidity or fluid transport (e.g. xylum in plants)\n\nSome cons\nCells with cell walls are limited in size by the size of the cell wall\nIn situations of high negative osmotic pressure the cell membrane can detatch from the cell wall and is often ruptured, killing the cell\nCells with cell walls are very rarely able to move unless they have specialist attatchments like flagella
756068
Increase in size for better dispersal of spores \nSporangia are more elevated above ground for better dispersal through air. \nDifferentiation of vascular tissue for more efficient transport of food and water through the plant body. \nEvolution of roots, stems and leaves. \nDifferentiation of xylem and phloem tissue \nWith increase in size tissues functioning in structural support also evolved. \nCells, vessel elements and sclerenchyma tissue which has Tracheid lignin evolved in secondary wall
810090
Penicillin affects the cell wall of prokaryotes.  Human cells are eukaryotes and do not have cell walls.  Actually, penicillin affects the prokaryote's ability to form the peptidoglycans that make up their cell walls.  Eukaryotic cells (human and any other animal cells) don't contain peptidoglycans.
773799
Cell walls surround the cell outside of the plasma membrane.  When water flows into the cell by osmosis, the cell swells until its membrane builds up pressure against the cell wall.  The cell wall prevents the cell from swelling and bursting in a hypotonic solution.
807700
Cellulose is produced by plants. It forms the primary structural component of green plants, within their cell walls. It has a very important structural role and is an important component of what we call "fiber" and "wood". Therefore, it has numerous commercial applications (cotton fiber, paper, construction material, etc.)
38656
cellouse is the awnser its a polysacharide. trust me chloroplasts are in the cell not part of the cell wall. IM in AP bio
301073
There are differences between fungi and algae, apart from chlorophyll and chloroplasts.\n\nAlgae are plants, and contain cellulose in their cell wall.\n\nThe cell wall of fungi contains chitin.\n\nThere are other differences, too.  Fungi vary greatly in reproduction strategies and mechanisms, for example.
951836
All cells have cell membranes.  They both have DNA and a lot of other stuff common to all life forms.  The main difference is that animal cells don't have cell walls but plant cells do.  If I were God, I would make animal bone cells have cell walls.  That would be cool.
972697
Centrioles.\n\nNucleic acid.\n\nCell membrane is found in both animals and plants but cell wall is found only in plants. Cell wall is made up of cellulose (carbohydrates), while cell membrane is made up of lipids. Cell wall does not regulate the movement of substances in and out of it, but cell membrane does.
752032
Gram positive bacteria possess a thick cell wall containing many layers of peptidoglycan and teichoic acids. In contrast, Gram negative bacteria have a relatively thin cell wall consisting of a a few layers of peptidoglycan surrounded by an outer lipid membrane containing lipopolysaccharides and lipoproteins. Most bacteria have the Gram negative cell wall; only organisms from the Phyla Firmicutes and Actinobacteria (previously know as the or low G+C and high G+C Gram positive bacteria, respectively).
803019
Its not as complicated as every one else made it.\n\nSo we can move.\n\nCellulose keeps the cells ridged, with ridged cells we would have a very small range of motion.\n\nOur cells need to be able to flex and squish so we can move. If we couldn't move we would need to be able to produce our own food, like plants do, or we would need to be single celled/simple organisms like bacteria.\n\nLike two of the others said: we use our bones for structural support, so cellulose is not needed for that purpose. Why have something when you don't need it, that is what evolution is all about.
702086
Collenchyma is strengthened by pectin so the cell wall is thickened unevenly.Parenchyma mostly found on the young shoots or leaves.They don't have cell wall.Sclerenchyma is strengthened by lignin.So,the strongest is Sclerenchyma because they cell wall thickened evenly not like collenchyma
849803
cell walls give structure.
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For Plant cells:\n\n1)Parenchyma cells:\n--Primary walls that are rel. thin and flexible, no secondary walls\n-- perform most of the metabolic activity of the cell (photosynthesis etc)\n-- Retain the ability to divide and differentiate\n\n2)Collenchyma cells:\n-- thicker primary walls, no secondary walls\n-- help support young parts of plants\n\n3)Sclerenchyma cells:\n-- thick primary and secondary walls\n-- Can no longer elongate, so occur in parts of the plant that have stopped growing\n-- dead at maturity\n\ntwo catergories: sclereids and fibers\n\n4)Water conducting cells of the xylem\n-- tubular, elongated cells\n--dead at maturity\n\n2 categories:\na) Tracheids: long, thin\nb) Vessel elements: wider, shorter, thinner walled\n\n5) Sugar conducting cells of the phloem\n\n-- Alive at functional maturity:\n* Sieve tube members are the main components of the phloem\n* Companion cells, which facilitate loading sugars
716689
YES plant cells do not have cell wall.\nBut animal cells have small spherical organells on the nucleus called centrioles.At the time of cell division , the spindle fiber formation originates from the centioles in animal cells\nIn the cytokynesis when the cyto plasm divides then only cell membrane develops in animal cell and cell plate develops in plant cell
54609
Keep the cell contents bound together,exchange gases and excreta,Semi permeable entry i.e. it protects the cell by allowing only some Substances to enter the cell, maintains the shape of the cell and helps in transfer of water from cell wall as it has hydrophilic proteins in plants
744514
Yes, both plant and animal cell have cell membrane. And remember without this, the onion and other things that you eat will be full of germs inside of it. And remember, cell Wall are fully permeable, they let everything pass through.