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Ways to Show Evolutionary Relationships:

Ways to Show Evolutionary Relationships:. Phylogeny - Classifying organisms based upon their evolutionary relationships. Phylogenic tree is a diagram that looks a bit like a family tree, showing who the nearest relatives were and who shared a common ancestor and when.

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Ways to Show Evolutionary Relationships:

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  1. Ways to Show Evolutionary Relationships: • Phylogeny- Classifying organisms based upon their evolutionary relationships. • Phylogenic tree is a diagram that looks a bit like a family tree, showing who the nearest relatives were and who shared a common ancestor and when.

  2. Cladogram- A chart that shows phylogenic (evolutionary) relationships between organisms.

  3. Each of these creatures has an evolutionary relationship to one another. They all share a common origin, and their current forms are all derived from branching events somewhere in the phylogenetic past.

  4. What features are shared by the salamander and mouse? Jaws and lungs Does the hagfish possess a jaw? No Why is the derived characteristic ‘feathers’ not written on the main axis like all of the other characteristics? B/c they are only possessed by the birds Use the cladogram to answer the following questions:

  5. A cladogram can be constructed for any group of organisms. Use the cladogram below to determine which characteristics are found in the: kangaroo, earthworm, amoeba, lizard, cat, sponge and salmon. (+ = present; - = not present) This cladogram wrong on your paper. Please use this cladogram to answer the questions Limbs

  6. Kangaroo- segmented body, jaws, hair, multicellular • Earthworm- segmented body, multicellular • Amoeba- n/a • Lizard- segmented body, jaws, multicellular, limbs • Cat- segmented, jaws, hair, placenta, multicellular, limbs • Sponge- multicellular • Salmon- segmented body, jaws, multicellular

  7. Classification Keys • A classification key, also known as a Dichotomous key, is useful in identifying unknown organisms (but is not limited to being used with living things). • Begin on line 1 (reading choices a and b). Choose the statement that matches your organism. • Follow the Go To direction until you come to a line that identifies the organism by name.

  8. Pinus ponderosa Monodon monoceros Passer domesticus Ophiophagus hannah

  9. Pg. 15 • Now try it yourself! • Terms to keep in mind: • Notched or lobed leaf • Serrate or “sawtooth” edge

  10. Sweet gum tree magnolia English oak White elm

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