Taxonomy Organisms are grouped based on common characteristics

Taxonomy Organisms are grouped based on common characteristics Life Sciences 11 – Taxonomy PPT #1 Ms. Dhir February 2019

TAXONOMY Taxonomy is covered in Chapter 15 of your Biology textbook. However, your book is so old there have been many taxonomyrelated changes since it was published. Therefore, we are using a different textbook instead. (you will receive a photocopy of the relevant chapter)

TAXA

PHYLOGENETIC TREES

CLADOGRAM

What is the difference between cladograms and phylogenetic trees? • “Both cladograms and phylogenetic trees show the relationships between organisms, but their main difference is how they compare them. Cladograms are concerned with the way organisms are related to common ancestors through shared characteristics. Phylogenetic trees compare organisms over evolutionary time and the amount of change that has occurred over time to figure out the relationships. Both cladograms and phylogenetic trees are drawn using lines to show relationships. The difference is that the length of the lines in a phylogenetic tree represents time while the lines in cladograms are the same length. ” • Barb, MS in Biology, Freelance Researcher and Writer • https: //www. quora. com/What-is-the-difference-between-cladogram-and-phylogenetic-tree

What is the difference between cladograms and phylogenetic trees? • “A cladogram is a type of phylogenetic tree that only shows tree topology—the shape indicating relatedness. It shows that, say, humans are more closely related to chimpanzees than to gorillas, but not the time or genetic distance between the species. . ” • Jeff Collins, Science educator, freelance writer • https: //www. quora. com/What-is-the-difference-between-cladogramand-phylogenetic-tree

What is the difference between cladograms and phylogenetic trees? • “Both phylogenetic trees and cladograms help show the relationships between different organisms, but only phylogenetic trees have branches that represent evolutionary time and amount of change. ” • Cynthia M Stein • https: //www. quora. com/What-is-the-difference-between-cladogramand-phylogenetic-tree

A few videos for you: 1. Amoeba sisters (7: 41) 2. Crash Course Biology (12: 16)

Read your Chapter 13 handout from page 264 Classification and Phylogeny through middle of page 268 (Stop at Molecular Systematics) Complete the Amoeba Sisters video handout and hand in Complete the Crash Course Biology video handout and hand in WHAT YOU NEED TO DO