Membrane is the answer i think
The answer would be:
Cilium
<u>Here is more about the structures of prokaryotic cells:</u>
Axial filament is a bundle of flagella that are wrapped around the cell's body.
Flagellum is what the prokaryotic cell has that is whip-like in structure. It helps with the motility of the cell.
Pilus is a hair-like structure that are found on the surface of prokaryotic cells. They help the cell attach itself to surfaces.
Peritrichous flagella are several flagella that can be found all over some prokaryotic cells.
A: It makes the most sense, and when you think photosynthetic rate, you think surface area. The leaves don’t need to be bigger since they already have sun, but to prevent evaporation it makes sense to have smaller leaves