Unformatted text preview: 3/20/12 Systema.cs and Diversity Pages 127-138 Objec.ves Know why we classify organisms Know how we classify organisms The difference between systema.c and categorical classifica.on Know how to read a phylogeny 1 3/20/12 Background Exercise 1 Work in groups of 4 The figure in the note book is JUST AN EXAMPLE. Make your own tree using ALL the balls. Stop when you are finished DON'T DO EXERCISE 2 YET. 2 3/20/12 Exercise 2 Homologous trait- a trait that has a similar structure regardless of func.on Analogous trait- a trait that has a similar func.on but not a similar structure Exercise 2 3 3/20/12 Exercise 2 Work in groups of 2 Pictures are on p. 132-133 Wright you answers in Table 1 on p. 131 4 3/20/12 Phylogeny of Exercise 2 animals Chipmunk Porcupine Bat Dolphin Osprey Tortoise Shark Dragonfly Bu[erfly Sowbug Crawfish Spider Snail 5 3/20/12 Exercise 3 Challenge 1 Work in groups of 4 Read the direc.ons on p.134 Do challenge 1 Make a tree like in Exercise 1 DO NOT PUT THE CARDS UP H D E B Runners? Species Check-In Stations? Tree Branches Race Course? Phylogenetic Tree C A F G 6 3/20/12 Exercise 3 Challenge 2 Put runner I in to the race No one turned around and went backwards No one A-H can move in the tree. Exercise 4 Fibrous root- roots that spread out into hair like structures. Tap root- a deep thick root like a carrot. Basal leaves- leaves that are a[ached to a plant at its base. Cauline leaves- leaves that branch off of the plants stem Simple leaves- leaves that appear one per branch. Compound leaves- leaves that appear in bunches on the same branch 7 3/20/12 Exercise 4 Challenge 1 Work in groups of 4 Use table on p. 136 to organize traits Use S for simple and C for compound Then make a tree for these plants Exercise 5 Challenge 2 In groups of 2 Use the DNA sequences to find which tree is correct. 8 ...
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- Spring '09
- Evolution, branch, Phylogenetics