anonymous
  • anonymous
do protists have cell walls.. if so what is it made of
Biology
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schrodinger
  • schrodinger
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2bornot2b
  • 2bornot2b
I think they have, and they are composed of cellulose, protein strips(pellicle) and silica
2bornot2b
  • 2bornot2b
It varies with different types of protists but mostly cellulose, some other components like pectin are found in the cell walls
anonymous
  • anonymous
thanks do you know any good websites w/ archaebacteria kingdom examples + pictures with scientific name?

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2bornot2b
  • 2bornot2b
Try posting that question, others might know, although please try and give the biology group a little time, someone will answer
2bornot2b
  • 2bornot2b
I mean if you allow some time you can get better answers..
2bornot2b
  • 2bornot2b
But there is no harm is trying the chat rooms.
Preetha
  • Preetha
http://www.ruf.rice.edu/~bioslabs/studies/invertebrates/kingdoms.html
anonymous
  • anonymous
does anyone know a good website with unusual facts about different kingdoms ( mostly archaebacteria and eubacteria) no wiki please http://openstudy.com/study#/updates/4f2d8bade4b0571e9cba8165
Preetha
  • Preetha
So all protists have a cell membrane. Some have cell walls like plant cells in addition to the cell membrane. Cell Wall - What's it for? While cell membranes might be around every cell, cell walls made of cellulose are only found around plant cells. Cell walls are made of specialized sugars called cellulose. Cellulose provides a protected framework for a plant cell to survive. It's like taking a water balloon and putting it in a cardboard box. The balloon is protected from the outside world. Cellulose is called a structural carbohydrate (complex sugar) because it is used in protection and support. Cell walls also help a plant keep its shape. While they do protect the cells, cell walls and cellulose also allow plants to grow to great heights. While you have a skeleton to hold you up, a 100-foot tall redwood tree does not. It uses the strong cell walls to maintain its shape. For smaller plants, cell walls are slightly elastic. Wind can push them over and then they bounce back. Big redwoods need strength in high winds and sway very little (except at the top). http://www.biology4kids.com/files/cell_wall.html
Preetha
  • Preetha
What is a cell membrane? lexible Containers The cell membrane is not one solid piece. Everything in life is made of smaller pieces and a membrane is no different. Compounds called proteins and phospholipids make up most of the cell membrane. The phospholipids make the basic bag. The proteins are found around the holes and help move molecules in and out of the cell. Scientists describe the organization of the phospholipids and proteins with the fluid mosaic model. That model shows that the phospholipids are in a shape like a head and a tail. The heads like water (hydrophilic) and the tails do not like water (hydrophobic). The tails bump up against each other and the heads are out facing the watery area surrounding the cell. The two layers of cells are called the bilayer. Ingrained in the Membrane What about the membrane proteins? Scientists have shown that the proteins float in that bilayer. Some of them are found on the inside of the cell and some on the outside. Other proteins cross the bilayer with one end outside of the cell and one end inside. Those proteins that cross the layer are very important in the active transport of ions and small molecules. http://www.biology4kids.com/files/cell_membrane.html
Preetha
  • Preetha
Take a look at that site. It has some good pictures of cell walls and membranes

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