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Sea urchins, class Echinoidea
The tube foot
The tube foot
The structure that controls traffic to and from the cell is the plasma membrane. It is not to be confused with the cell wall, which serves more to give structure to the cell.
A starfish is an echinoderm.
It's the cell theory
It gives the cell structure and shape
The Cell Structure is basically a cell with a nucleolus, ribosomses, lysosomoes, and etc. The cell structure has all of these objects or things put together in the cell to make a single cell work.
Echinoderm is an invertebrate and therfore it has no backbone
Yes sand dollar is an echinoderm.
No. A spider is an arachnid. A starfish is an example of an echinoderm.