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Species F100 80 MYA MYA40 MYA20 MYAWhich of the following hypotheses about the last common ancestor of these species provides the simplest explanation for the infor...

Question

Species F100 80 MYA MYA40 MYA20 MYAWhich of the following hypotheses about the last common ancestor of these species provides the simplest explanation for the information in this phylogenic tree; based on the principle of parsimony? In other words which hypothesis requires fewer evolutionary transitions (.e, from endothermy ectothermy, or from ectothermy to endothermy)?The last common ancestor was cold-blooded (ectothermic), and some species later evolved to become warm-blooded (endothermic) B.

Species F 100 80 MYA MYA 40 MYA 20 MYA Which of the following hypotheses about the last common ancestor of these species provides the simplest explanation for the information in this phylogenic tree; based on the principle of parsimony? In other words which hypothesis requires fewer evolutionary transitions (.e, from endothermy ectothermy, or from ectothermy to endothermy)? The last common ancestor was cold-blooded (ectothermic), and some species later evolved to become warm-blooded (endothermic) B. The last common ancestor was warm-blooded (endothermic), and some species later evolved to become cold-blooded (ectothermic) Clear my choice



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On the phylogenetic tree of amniotes (below), map the evolutionary origin of the following traits: endothermy, hair, and feathers. Which of these traits appears to have evolved convergently in more than one lineage? What is a likely functional relationship among these traits? What are some reasons why many paleontologists think many extinct theropods were endothermic?

What can we say about the parsimony principle when related to follow genetic trees? Mhm. Well, first off, the parsimony principle is the simplest explanation for scientific evidence. So when we talk about the relationship between the parsimony principle and file a genetic trees, we can say it is logical to adopt the simplest hypothesis capable of explaining the known facts. This is.

According to our best scientific evidence by evolution species descended from a common ancestor, slowly and gradually by the accumulation of many small changes with note. This is Darwinian, Mrs Darwin, for Happens be rapidly through divergent evolution alone. See rapidly through mutation alone D in spurts of relatively rapid changes, or E because they needed to adapt to a changing environment or they would die. So e is quite true, um, is natural selection. Evolution occurs because we adapt to environments. Um, but not always truth. Perhaps you have a pioneer organism that adapts to an environment that was already there. Perhaps you have genetic drift from, say, geographic or reproductive isolation, so he is really confusing answer. But what we're looking here is for the Eldridge and Gould's theory of punctuated equilibrium. So punctuated equilibrium here could be best described as D in spurts of relatively rapid changes. So we have, ah, long time of not much change and then relatively rapid spurts of evolution

What is the out of africa hypothesis is a all a new species of prominence arose in africa and then migrated out be many new species arose out of africa but migrated back in. See all homens appreciation events occur outside of africa. What's he? All speciation events occur in Africa, but only homo sapiens distribute itself across the globe. Okay, so first of all, it's not going to be c because we know that out of africa, as the name suggests, indicates that Barack um commons leaving africa. So speciation has to be carrying within africa as well. Now what about the so again be is incorrect? The out of africa hypothesis is that all new species arose in Africa. The alternative the multi regional hypothesis would allow for new species arising outside of africa and migrating chicken. But the out of africa, is that all new species? Okay. Put which one's migrated to rest for world. Do we find only homo sapiens outside of Africa or do we find other species as well? We find other species as well. For example, harmony influences. Founds outside africa. So it's going to be a nazi here. Yes. Is a

This question that we're looking at be lost common ancestor for African apes. That's how minutes so a it has been found was that was given. He has not been identified but is expected to be dating from 6 to 7 million years ago. See Has been found. Undated A 30 million years ago, he is not expected to be found because there was no common ancestor. A merciful It's in Asia, Africa as returns with without by process of elimination, So would it resemble a given? Well given isn't Asian eight. So it's split off from Gibbons, soon it on the Spitzer from African apes. You would not expect our common ancestor without Canapes. Tourism likeable. So you know that we will come back to This is the answer. See, 30 million years ago, ISS far too early. We splits off these. It's about six million years ago s so we would expect cycle ancestor to be around. That's on like the not expected to be found because there was no such common ancestor again. It's unreasonable because the African apes includes chimpanzees, bonobos and Tom. UNAIDS includes our direct ancestors, so we would expect to calm analysis. That's come up here because the chimpanzees and bonobos are our closest relatives. Outside of dominance, if I'm the what the African apes live in Africa. Um, the early hominids lived in Africa, so their common ancestor we would also expect Do you also is going to be It matches to be time we would expect from the time we split off from chimpanzees. Well, because his ancestors, so be it.


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