Campbell Biology In Focus, Loose-leaf Edition (3rd Edition)
Campbell Biology In Focus, Loose-leaf Edition (3rd Edition)
3rd Edition
ISBN: 9780134895727
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky
Publisher: PEARSON
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Chapter 19.3, Problem 3CC

WHAT IF? Fossils show that dinosaurs originated between 200 and 250 million years ago. Would you expect the geographic distribution of early dinosaur fossils to be broad (on many continents) or narrow (on one or a few continents only)? Explain.

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WHAT IF? Suppose a molecular clock dates the divergence of two taxa at 80 million years ago, but new fossilevidence shows that the taxa diverged at least 120 millionyears ago. Explain how this could happen.
Please do fast   How old are the first recognizable mammals relative to the K/T boundary layer (i.e., extinction of the dinosaurs), and from what reptilian lineage did they evolve? Is this lineage the same reptilian lineage that gave rise to birds? How are these lineages distinguished? Hold old are the first fossil birds? What other plant/animal lineages first became widespread in the Tertiary that were less common in the Cretaceous?..
1. Approximately when did the woolly mammoth go extinct? 2. Is the wooly mammoth more closely related to the Asian elephant or to the American Mastodon? PLEASE EXPLAIN YOUR ANSWER. USE THE WORD: Common ancestor
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Fossil: The Language & History of Paleontology; Author: Alliterative;https://www.youtube.com/watch?v=x9yNwRBlKtU;License: Standard youtube license