Pakicetus is an ancient wolf-like organism that lived 50 million year ago. It had wolf-like ears and nostrits 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 conclusion that biologists could draw about the retationship of Aetiocetus to the other organisms is that Aetiocetus O evolved as whale ancestors lost their forward-placed nostrits through disuse. O is the ancestor of both Pakicetus and modern whales. O is not related to elither Pakicetus or modern whales. is a transitional form between Pakicetus and modern whales

Pakicetus is an ancient wolf-like organism that lived 50 million year ago. It had wolf-like ears and nostrits 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 conclusion that biologists could draw about the retationship of Aetiocetus to the other organisms is that Aetiocetus O evolved as whale ancestors lost their forward-placed nostrits through disuse. O is the ancestor of both Pakicetus and modern whales. O is not related to elither Pakicetus or modern whales. is a transitional form between Pakicetus and modern whales

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter24: Systematics And Phylogenetics: Revealing The Tree Of Life

Section: Chapter Questions

Problem 1ITD: The phylogenetic tree for 12 cat species (Felidae) reproduced at right was assembled from molecular...

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