Explain the significance of the discovery of Archaeopteryx. Why did this fossil demonstrate beyond reasonable doubt that birds are grouped phylogenetically with dinosaurs?

Do you think Paranthropus and Homo interacted? What is your evidence?

Pakicetus is an ancient wolf-like organism that lived 50 million year ago. It had wolf-like ears and nostrils on the front of its skull. Modem whales have a similar ear structure, but their nostrils are on the back of their skull. Aetiocetus lived 25 million years ago, had the same ear structure as both Pakicetus and modern whales, but nostrils in the middle of its skull. According to this information, the most likely concilusion that biologists could draw about the relationship of Aetiocetus to the other organisms is that Aetiocetus O evolved as whale ancestors lost their forward-placed nostrils through disuse. O is the ancestor of both Pakicetus and modern whales. O is not related to either Pakicetus or modern whales. O is a transitional form between Pakicetus and modern whales.

What is present on the feet of birds which provides more evidence for their evolution from reptiles and dinosaurs?

In your Introduction to Biological Anthropology class, your instructor asks you to examine a fossil skull and determine which species it is. You note there is a sagittal keel at the top of the skull. Based on this information alone, to which species does the skull belong? A. Australopithecus boisei B. Homo habilis C. Australopithecus garhi D. Homo erectus

During what era did the dinosaurs become extinct.

Flight in birds developed over time as a result of multiple evolutionary steps. The development of feathers, hollow bones, large flight muscles, and efficient gas exchange were all vital for flight. Describe the order in which these adaptations likely evolved and explain your reasoning.

Describe a reason for the hypothesis that the ancestor of eleuthero-zoan groups was a radial, sessile organism.

Use the photo and fossil of this specimen (they are from the same species that was an ancestor to a modern class of tetrapods) to answer the following: What class of tetrapod would you predict this specimen belongs to? What features of the body make it resemble the class you provided? What MAJOR ABILITY would this specimen lack that the class above would have? What is the name of this type ancestral specimen?