Mitochondria, plastids and chloroplast all are surrounded by a double membrane
The cell wall is what gives plant cells their shape. The cell wall, not to be confused with the cell membrane, is a rigid structure made up of long cellulose fibers, branching hemicellulose fibers, and pectin. The fluid pressure inside the cell also contributes somewhat to their shape.
Answer:
I'm pretty sure it's transport blood cells
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