Wake-up Make 2 observations about the diagram below. Make sure that it has to do with the animals, not the design of the diagram.

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Presentation transcript:

Wake-up Make 2 observations about the diagram below. Make sure that it has to do with the animals, not the design of the diagram.

Cladograms Christopherson

Define: Cladistics/Phylogeny Evolutionary history of organisms

Cladogram/Phylogenic Trees Diagram representing evolutionary relationships

How to Read a Cladogram

How to Make a Cladogram #1 Group organisms by shared characteristics; often provided

How to Make a Cladogram x x x x x x x x x x Characteristics Shark Bullfrog Kangaroo Human Vertebrate Two pairs of limbs Mammary glands Placenta x x x x x x x x x x

How to make a Cladogram #2 Draw a Venn diagram; start with large circle for the characteristic that ALL organisms share and work in to more specific

Placenta Mammary Glands 2 Limbs Vertebrate

How to make a Cladogram #3 Construct a cladogram; lines represent organisms; characteristics in between the organisms

Human Kangaroo Bullfrog Shark Placenta Mammary Glands Pairs of Limbs Vertebrate

Activity: Creating a Cladogram