Campbell Biology In Focus
2nd Edition
ISBN: 9780134203072
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 20, Problem 7TYU
Summary Introduction
Introduction:
Phylogenetic tree a branching diagram that shows conclude evolutionary relationships among various species. Their phylogeny based upon similarities and differences in their characteristics which can be genetically or physically. Branch lengths in phylogenetic tree are proportional the amount of evolutionary change.
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The challenge in using sequence data to estimate the evolutionary tree for all living things is to find a gene that shows recognizable sequence similarities even between highly distantly related species . Which of the following should NOT be among the features of this gene?
A. The gene subject to strong diversifying selection.
B. It is present in all organisms.
C. It encodes a product whose function is essential.
D. The function of the gene must have remained the same in all organisms.
DNA sequence data suggest that modern humans last shared a common ancestor with Old World monkeys about 25 million years ago. In contrast, humans last shared a common ancestor with New World monkeys about 40 million years ago. What could be concluded about evolutionary relationships among these groups?
A. Humans are more closely related to Old World monkeys than to New World monkeys.
B. Old World monkeys are more closely related to humans than to New World monkeys.
C. Both A and B are correct.
D. Neither A nor B is correct.
Explain.
Which of the following best reflects a phylogenetic relationship between chimpanzees and baboons?
A.
They are grouped together because they live in similar habitats.
B.
They are grouped together because they have a common ancestor in recent history.
C.
They are grouped together because they both have an opposable thumb.
D.
They are grouped together because they both feed their young breast milk.
Chapter 20 Solutions
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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- You are studying the evolution of a trait in two species of snakes where both species can flatten themselves so that they can glide from tree to tree. You know that this trait is not present in the ancestor of all snakes. With this information, is the trait a homology? a. Yes b. No c. Only in one of the species. d. Not enough information to tell.arrow_forwardSelect the taxon that MOST CLOSELY applies to each of the statements below regarding anthropoids. Each term may be used once or not at all. Hominin genus with small head and oval birth canal. a. Homo sapiens + Species with a brain mass approximately three times larger than that of b. Homo heidelbergensis other extant hominins. c. Homo floresiensis * Species that comparative genomics suggests hybridized with Homo sapiens. d. Gigantopithecus e. Aegyptopithecus + Small-statured species found in Indonesia up to about 50,000 years ago. f. Homo neanderthalensis + Genus conjectured by some to have been responsible for the Yeti myth in southeast Asia. g. Homo h. Homo erectus i. Ardipithecus ramidus j. Proconsul k. Homo habilis 1. Australopithecus m. Australopithecus afarensisarrow_forwardEvolutionary theory predicts that species are related, not independent. Four of the following examples provide support for this prediction, but one is irrelevant. Which of examples listed below does not support the claim that species are related? A. Many dinosaurs and other organisms went extinct following a huge asteroid impact at the end of the Cretaceous. B. Before synthetic insulin was available, diabetics used injections of purified pig insulin to manage their disease. C. The endostyle of lancelets (invertebrate chordates) and the thyroid gland of vertebrates develop similarly, and both produce iodinated proteins. D. All prokaryotes and eukaryotes use DNA to carry their genetic information. E. Ground squirrel species found on the North and South sides of the Grand Canyon are very similar to each other.arrow_forward
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