In the phylogenetic tree below, which group(s) are...

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00:01 Which of these groups are monophyletic? okay, so we have three groups here.

00:06 What does it mean to be monophyletic? monophyletic means it includes the common ancestor and all of the descendants.

00:17 So none of them are missed out.

00:19 And there are two other types of group that you might see, paraphyletic and polyphyletic.

00:26 So paraphyletic groups are quite similar to monophyletic.

00:32 The common ancestor, but they only have some descendants.

00:38 They miss some of them out.

00:42 And polyphyletic doesn't have the common ancestor.

00:47 It just has a variety of descendant groups.

00:52 So variety of descendants groups.

00:57 Okay, so what does this mean for our three groups here? let's start looking at group one.

01:04 So group one looks something like this.

01:06 So there's a a branch here, there's another one here, it goes like this, roughly.

01:17 And the entire group is included.

01:20 So does it have a common ancestor? yes, the common ancestor is back here.

01:26 Does it have all of the descendants? yes, there are no branches not included in this group.

01:31 So this, this is more phyletic.

01:33 Perfect...

In the phylogenetic tree below, which group(s) are monophyletic? (select all that apply) Group 1 Group 2 Group 3 Group 1 Group 2 None of these groups are monophyletic Group 3