Explain how vestigial structures provide clues about a species’ evolutionary past. illustrate your argument with vestigial structures found in humans or other real species.

The current thought on the structure of the cell membrane is: a. a static phosphate sandwich of lipids b. a fluid-mosaic of phospholipids and proteins c. a bilayer of proteins with static lipid molecules d. an impermeable bilayer of protein molecules e. a static and permeable phospholipid single layer