00:01
Hello there students.
00:02
Today we're going to be answering this question in regards to a chapter on reconstructing and using phylogeny and for this question they want to know how can fossils be helpful for identifying ancestrial and derivative traits of organisms and also they would like for you to provide an example for this question.
00:26
You could pause a video and write down the answer and the example that you have and we'll go over this shortly.
00:34
Okay, so how can fossils be helpful for identifying ancestral and derivative traits of an organism? how they could be helpful is that the fossils can give us direct evidence of the character state.
01:12
The character states of extinct, oh, oh, oh, of lineage.
01:30
So that's how they can help us in that.
01:34
And the example that they provide is, now just write abbreviation, just an example of that would be how all modern birds last teeth and they want to know like is the lack of teeth in ancestral or a derivative condition well they're going to say if we examine the extinct species of your therapy parts certain is friends that we see we see that they had teeth...