Answer:
Animals, including humans, store glucose in the form of glycogen.<em>(option 2)</em>
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Flatworms absorb oxygen by diffusion mechanism through their
skin to the cells in their bodies. Since flatworms do not have a circulatory system,
their bodies' cells are positioned close to the skin to ease the uptake of
oxygen from surrounding fluids or water.
Amino acids are used in the production of proteins!
Similar: They are made by proteins and glycoproteins like all the cells are. The also have DNA or RNA to reproduce and they also evolve to adapt.
Difference: They don't use the cell division phase and they are not alive.