00:01
So when you are organizing a phylogetic tree, the best thing you can do for yourself is organize your data in such a way that you have the most shared synomorphies to the least shared.
00:27
So when you're looking at this chart, you can see that jaws has seven common traits.
00:35
Lungs have six, nails and claws have five, and what starts to make the day a little bit more harder to read is scales because there are three common.
00:51
So since scales have three in common, they should be after nails and claws.
00:56
But they're not on this chart, so it makes it exponentially more difficult to read.
01:02
Then next would be gizzards with two, feathers or go gizzard feathers with one and then you go fur and then mammary glands now what i mean by that is if we go and we draw at this chart when you first off the tree you go down here and jaws are the first cinemorphy so then you branch it off boom lamprey don't have jaws so they split them off they're done.
01:42
Next evolutionary event is lungs.
01:48
So you go up, what doesn't have lungs on the chart is a perch.
01:54
Perch you're done.
01:56
Next after lungs, you have nails or claws.
02:06
You go up, split it off again.
02:08
What does it have in nails and claws? a salamander.
02:13
Then once you split it off again, it would go next, like how i said earlier, would be scales.
02:26
And it splits off again.
02:28
I'm going to make a little bit bigger.
02:31
So now under the category of them that do have scales, we are going to go and say that we have here a lizard, a crocodile, and a pigeon.
02:45
So then next, what you're going to read is going to be gizzard...