Campbell Biology
3rd Edition
ISBN: 9781269937832
Author: Reece, Urry, Cain, Wasserman, Minorsky, Jackson
Publisher: Pearson Custom Publishing
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Chapter 25.2, Problem 1CC
WHAT IF? Ø Your measurements indicate that a fossilized skull you unearthed has a carbon-14/carbon-12 ratio about 1/16 that of the skulls of present-day animals. What is the approximate age of the fossilized skull?
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Chapter 25 Solutions
Campbell Biology
Ch. 25.1 - What hypothesis did Miller test in his classic...Ch. 25.1 - How would the appearance of protocells have...Ch. 25.1 - Prob. 3CCCh. 25.2 - WHAT IF? Your measurements indicate that a...Ch. 25.2 - Describe an example from the fossil record that...Ch. 25.2 - Prob. 3CCCh. 25.3 - The first appearance of free oxygen in the...Ch. 25.3 - What evidence supports the hypothesis that...Ch. 25.3 - WHAT IF? What would a fossil record of life today...Ch. 25.4 - Explain the consequences of plate tectonics for...
Ch. 25.4 - What factors promote adaptive radiations?Ch. 25.4 - Prob. 3CCCh. 25.5 - Explain how new body forms can originate by...Ch. 25.5 - Why is it likely that Hox genes have played a...Ch. 25.5 - MAKE CONNECTIONS Given that changes in morphology...Ch. 25.6 - How can the Darwinian concept of descent with...Ch. 25.6 - Prob. 2CCCh. 25 - Describe the roles that montmorillonite clay and...Ch. 25 - What are the challenges of estimating the ages of...Ch. 25 - What is the "Cambrian explosion," and why is it...Ch. 25 - Explain how the broad evolutionary changes seen in...Ch. 25 - How could changes in a Single gene or DNA region...Ch. 25 - Explain the reasoning behind the Statement...Ch. 25 - Prob. 1TYUCh. 25 - The oxygen revolution changed Earth's environment...Ch. 25 - Prob. 3TYUCh. 25 - Prob. 4TYUCh. 25 - Which of the following steps has not yet been...Ch. 25 - Prob. 6TYUCh. 25 - Prob. 7TYUCh. 25 - EVOLUTION CONNECTION Describe how gene flow,...Ch. 25 - Prob. 9TYUCh. 25 - WRITE ABOUT A THEME: ORGANIZATION You have seen...Ch. 25 - Prob. 11TYU
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- WHAT IF? In several different animal lineages, organisms with a head first appeared around 530 million yearsago. Does this finding constitute proof that having ahead is favored by natural selection? Explainarrow_forwardQ8: Which of the following hominins has the most shared-derived traits with modern humans? A: Homo heidelbergensis B: Homo naledi C: Australopithecus africanus D: Paranthropus boisei Q14: Which of the following are things we would find at an archaeological site that indicate Lower Paleolithic stone tool production? (Choose all that apply) A[]: chisels B[]: grinding stones C[]: Flakes with bulbs and rings of percussion D[]: copper billets E[]: diamond drillsarrow_forwardWHAT 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.arrow_forward
- WHAT IF? Neanderthal fossils have been found only in Europe and theMiddle East. Explain how Neanderthals could be more similar genetically tonon-Africans than to Africans and yet be equally close to humans from France,China, and Papua New Guineaarrow_forward. WHAT IF? Imagine that we could replay the history oflife. Is it possible that a group of vertebrates that colonized land could have arisen from aquatic gnathostomesother than the lobe-fins? Explain.arrow_forward1. Which hominin existed for the longest time on earth? 2. Which hominins lived in the same area at the same time?arrow_forward
- What differences do you see? Which species look most like modern humans? How have bodies and pelves changed over hominin evolutionary history? Why is the breadth of the pelvic inlet important? What might it tell us about a species’ social behavior or life history?arrow_forwardCan you ID ancestral skulls and non-human primate skulls? At least, which is older?arrow_forwardCompare a Male Baboon to a Male Human. Compare the Articulated Foot, the Coccyx/Sacrum/Os Coxae, and the Craniums. Describe similarities and differences. Could you identify the species if you came upon a skull of one or the other? How?arrow_forward
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