00:01
What are the wings of birds, the legs of pigs and the flippers of dolphins an example of? a, vestigial structures, b, homologous structures, c, acquired characteristics, d, artificial selection, or e, uniformitarianism.
00:19
So if we just define these, we can be able to work out.
00:21
Vestitual structures.
00:23
So these historically in an ancestor had a useful purpose, but in the current form, do not.
00:32
For example, some humans have small muscles that allow them to twitch their ears, which has no functional use in humans, but in one of our ancestors it did, so we still have the prestige of it.
00:49
Homologous structures.
00:50
So these are structures that share a great deal of anatomical similarities because they were inherited from the same common ancestor...