Explanation:
Saturated Fatty Acids
The primary components of fatty acids are carbon, hydrogen, and oxygen. When carbon atoms bond together, they form a single bond and can exhibit a zig-zag shape. When the overall molecule is seen, the entire fatty acid appears as a fairly straight line.
Because to actually use the word evolve an organism must suffice more than one condition, which in this case would be an advantageous trait. Having an advantageous trait (from our eyes at least) must also include the right and stimulating enviironment for procreation. So this answer is multifolded.