EBK CAMPBELL BIOLOGY IN FOCUS
2nd Edition
ISBN: 8220101459299
Author: Reece
Publisher: PEARSON
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Chapter 20.3, Problem 3CC
WHAT IF? Draw a phylogenetic tree that includes the relationships from Figure 20.16 and those shown here. Traditionally, all the taxa shown besides birds and mammals were classified as reptiles. Would a cladistic approach support that classification? Explain.
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WHAT IF? Fossils show that dinosaurs originated200–250 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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Chapter 20 Solutions
EBK CAMPBELL BIOLOGY IN FOCUS
Ch. 20.1 - Which levels of the classification in Figure 20.3...Ch. 20.1 - Which of the trees shown here depicts an...Ch. 20.1 - Prob. 3CCCh. 20.2 - Decide whether each of the following pairs of...Ch. 20.2 - WHAT IF? Suppose that two species, A and B, have...Ch. 20.3 - Prob. 1CCCh. 20.3 - The most parsimonious tree of evolutionary...Ch. 20.3 - WHAT IF? Draw a phylogenetic tree that includes...Ch. 20.4 - What is a molecular clock? What assumption...Ch. 20.4 - MAKE CONNECTIONS Review Concept 14.5. Then...
Ch. 20.4 - WHAT IF? Suppose a molecular clock dates the...Ch. 20.5 - Why is the kingdom Monera no longer considered a...Ch. 20.5 - Prob. 2CCCh. 20.5 - Prob. 3CCCh. 20 - In a comparison of birds and mammals, the...Ch. 20 - To apply parsimony to constructing a phylogenetic...Ch. 20 - Prob. 4TYUCh. 20 - Prob. 5TYUCh. 20 - If you were using cladistics to build a...Ch. 20 - Prob. 7TYUCh. 20 - SCIENTIFIC INQUIRY DRAW IT (a) Draw a phylogenetic...Ch. 20 - FOCUS ON EVOLUTION Darwin suggested looking at a...Ch. 20 - Prob. 10TYUCh. 20 - SYNTHESIZE YOUR KNOWLEDGE This West Indian manatee...
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- INTERPRET DATA Imagine that you discover a new animal in a rain forest. It has an elongated, segmented body with bristles, and it has no obvious head. Where would youplace this animal in the accompanying cladogram? Support your decision. Look at the more detailed cladogram inFigure 30-6a (in Chapter 30). What additional characteristicswould help you place your animal in this cladogram? Explainyour decision-making process.arrow_forwardDesign an Experiment Imagine that you are trying to determine the evolutionary relationships among six groups of animals that look very much alike because they have few measurable morphological characters. What data would you collect to reconstruct their phylogenetic history?arrow_forwardPlease help Sketch the phylogenetic treearrow_forward
- Give typed explanation of both otherwise leave itarrow_forwardHelp?arrow_forward3. The table below lists four characteristics of the shrimp, silverfish, dragonfly, beetle, and butterfly. For each animal, (+) indicates that the character is present and (-) indicates the character is absent. Character Shrimp Silverfish Dragonfly Beetle Butterfly (В) (OG) (A) (C) (D) 3-pairs legs Wings Pupa Sucking mouthparts - + + + + A) Evaluate the three phylogenetic trees below by mapping the four characters onto each tree. Be sure to use the labels indicated by the key. Tree I Tree II Tree II OG OG OG A A В B A В W: wings (-)→ (+) W: wings L: 3 pairs legs (-)→(+) (+)→(-) Р: pupa (-)—> (+) SM: sucking mouthparts (-)→ (+)arrow_forward
- 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?..arrow_forwardPlease answer all questionsarrow_forward\. Read some papers (find them using any of several literature-search engines that your instructor can suggest) that make different estimates of the timing of either the origin of bilaterian animal phyla or the orders of mammals. How different are the estimates based on molecular clock evidence versus paleontological evidence? What might account for these differences, and how might they be resolved?arrow_forward
- Fill in the Blanks. What are the correct answers?arrow_forwardplease give answer asap explain pleasearrow_forwardPlease just solve question 5, thanku! 2.Clades can be described as "natural groups."Why do you Bthink this is so？ 3.What do the“tips"and“branches"of a phylogenetic tree represent？ 4.Describe how you“trace ancestors back through time"on a phylogenetic tree. 5.Compare and contrast traditional and phylogenetic classification systems. (a）What are the advantages and disadvantages of each？ (b)Think of an example of when it would be useful to use a traditional classification.Why would this system be the best choice in this case？ (c)Think of a situation where it would be useful to use phylogenetic classification system.Why would this system be the best choice in this case？ 6. Traditional and phylogenetic classification systems usually place species in the same groups. For example，both systems place lions and tigers together，and horses.arrow_forward
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What is Evolution?; Author: Stated Clearly;https://www.youtube.com/watch?v=GhHOjC4oxh8;License: Standard Youtube License