Intermittent claudication in the legs.
Answer:
They contain a variety of biological molecules, notably lipids and proteins.
Explanation:
The answer would be single
First of all, the purpose of natural selection is to "weed out" the organisms in a species with imperfect qualities. Basically, it's evolution's way of making the species that best it can be.
An anteater eats insects (namely, ants) by sticking its snout and tongue through anthills and the ground. Obviously, the longer the snout of the anteater, the more possible bugs it can reach and, therefore, eat. So, over millions of years, anteaters with shorter snouts were not able to reach enough bugs and ended up dying. The anteaters with longer snouts had more food available because they could reach more bugs, so they were able to live long enough to reproduce and produce offspring with the preferred trait: having a longer snout.
To hydrogenate means to add hydrogen. When adding hydrogen, you saturate the fat (removing the double bonds). Saturated fat has a higher melting temperature, is more stable and more unhealthy.
Unsaturated fat has a lower melting temperature, is more healthy but more unstable.