WHAT IS LIFE? A GUIDE TO BIO 3E+LAUNCHPA
3rd Edition
ISBN: 9781319103316
Author: PHELAN
Publisher: Macmillan Higher Education
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Chapter 10, Problem 7SA
Summary Introduction
To review:
Apart from relationships among organisms, what else can be understood using phylogenetic trees.
Introduction:
A phylogenetic tree is a tree-like representation of organisms, to show how they are related to one another and whether one evolved from the other.
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Do you find it easy to interpret phylogenetic trees?
What aspects are the most challenging or what aspects of the tree can be easily misinterpreted?
What strategies can students use to correct or avoid these common misinterpretations?
Do you consider phylogenetic trees to be reliable indicators of evolutionary relationships?
Include a reference.
Which statement is usually true about phylogenetic trees?
a) nodes represent points when traits have evolved
b) branch tips that are next to each other are more closely related
c) the branching pattern describes the hypothesized evolutionary relationships between the taxa
d) the order of the branch tips (left to right) indicates which taxa are more advanced evolutionarily
1.
a) What is a phylogenetic tree?
b) What do the lines and branches in a phylogenetic tree represent?
Chapter 10 Solutions
WHAT IS LIFE? A GUIDE TO BIO 3E+LAUNCHPA
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- What does a phylogenetic tree depict?arrow_forwardWith two specific examples, explain why phylogenetics is a useful scientific tool for studying Organismal biology?arrow_forwardDraw a simple phylogenetic tree for two sisters clades with a common ancestor. Each sister clade consists of two taxa. Define the following terms and use to label your diagram: clade, node, branch, common ancestor, and taxon.arrow_forward
- How does a phylogenetic tree relate to the passing of time? Some organisms that appear very closely related to a phylogenetic tree may not actually be closely related (Example. Sharks and dolphins). Why is this?arrow_forwardWhich of the following is FALSE regarding phylogenetic trees? 1) The branch lengths on the tree are scaled to molecular (DNA) changes and/or time. 2)Phylogenetic trees have shown us that there is much more bacterial diversity compared to eukaryotes. 3) Phylogenetic trees show the evolutionary relatedness of different organisms. 4). The branch lengths on the tree depict abiotic and biotic factors affecting speciation.arrow_forwardPhylogenetic trees are a type of model that can be used to show how organisms are related through common ancestry. The phylogenetic tree model represents nodes numbered 1 through 8. Using evidence from the phylogenetic tree determine which species would be MOST closely related to the species on branch C? Question options: The species on Branch A is most closely related to the species on branch C because they share the most recent common ancestor at node 1. The species on Branch B is most closely related to the species on branch C because they share the greatest number of common +ancestors. The species on Branch A & B are both most closely related to the species on branch C because they share the most most recent common ancestor at node 2. The species on Branches F, G, H, and I are all equally related to the species on branch C because they all split from a common ancestor at the same time which is illustrated by having nodes 2 and 7 at the…arrow_forward
- a) What is a phylogenetic tree? b) What is a branch point? c) What are sister taxa? d) What is a ‘rooted’ phylogenetic tree?arrow_forwardAll the information you need is provided.arrow_forwardGenerate a present (1) or absent (0) code of each character. Afterward, draw the overall phylogenetic tree with the corresponding characters splitting the tree.arrow_forward
- Within the field of phylogenetics, what does a “bootstrap value” represent? (write/make 3 points for this question)arrow_forwardHow the phylogenetic tree is constructed ?arrow_forwardWhat is the purpose of using an outgroup when reconstructing a phylogenetic tree? [at least mention 4 points]arrow_forward
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