BIO153H5 Lecture Notes - Lecture 5: Symplesiomorphy, Synapomorphy
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Lecture 5: what type of data makes trees. We dis(cid:272)ussed the thi(cid:374)gs (cid:449)e should(cid:374)"t do. One of the things to reading trees is to draw them in different forms. 5-polytomy not enough info to decide which of the two groups is closely related. What would that branch look with the new evidence found: the relatedness of the three taxas, d and f are more closely related then either one of them. It would look like a, b, and c. can literally prune a tree, can take some taxas out. That"s (cid:449)h(cid:455) these skulls look (cid:448)er(cid:455) si(cid:373)ilar: all carnivores that a shared ancestor, the cheekbones and the teeth indicate that they have a common ancestors. But the(cid:455) are(cid:374)"t (cid:272)losel(cid:455) related even though the share similarities. Not related, one common ancestor but they split. One is related to kangaroos, and the other to cats. We have to be aware that they look the same, but no common ancestor,
