00:01
All right, so in this question, we are being given a cladogram that looks something like this.
00:07
For simplicity purposes, and my artistic skills, i did not draw the animals in and said i have them just abbreviated by a letter.
00:16
So on your left, going right, you have your shark, your frog, your lizard, goose, cat, and then human.
00:24
And a cladogram is pretty much a visual aid that represents an evolutionary relationship.
00:30
Relationship that exists between a group of organisms that are believed to share a common ancestor.
00:37
And that's kind of the key point here.
00:39
Due to the fact that if you look at it, it's pretty similar to like a phylogeny tree.
00:45
It all branches out from a root.
00:49
And your root in this example is going to be this all the way down here because as you can see, all the rest of the branches are stemming from this root.
00:57
And this root down here represents your common ancestor.
01:04
And whatever that may be, we don't know.
01:08
But that is just what this point in this graph represents.
01:14
From there, obviously you have your branches off.
01:17
And your first branches represent that of the oldest organism.
01:21
And your higher branches represent that of the most recent organism.
01:26
So that means from our common ancestor, to the left here is your first kind of branch...