Do all cells have a cell membrane?
All cells need a membrane. The membrane helps with keeping in all the fluids and organelles plus it takes in and sends out important things. Plant cells and bacteria have cell walls which give an extra layer of protection.
Do all plant cells have a cell wall and a cell membrane and animal cells have a cell wall but not a cell membrane?
Yes, all cells contain cell membrane, like animal and plant cell. But not all cells contain cell wall, this is why such cells contain cell membrane. Cell membrane, and without the cell wall, protect the things going in and out of a cell, like nutrients and oxygen in, and waste and carbon dioxide out. Cell membrane could also be described as a "wall for the house" which is the cell. Yes they do. The cell…
Not only Euglena, all living cells have cell membranes. This cell membrane is called as plasma membrane, which is a cell membrane. Plant cells have an additional outer membrane, called as cell wall, made up of cellulose. Animal cells lack cell wall but have plasma membranes. They also both have a Nucleus, which is the centre of a cell and controls all the cells activities.