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Dichotomous Keys: a set of paired statements that describe physical characteristics of different organisms.

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Presentation on theme: "Dichotomous Keys: a set of paired statements that describe physical characteristics of different organisms."— Presentation transcript:

1 Dichotomous Keys: a set of paired statements that describe physical characteristics of different organisms

2 Dichotomous Key: Name that potato chip!
? ? ? ? ? ? ?

3

4 Now it’s Your Turn to Practice using a dichotomous key!!
Practice classifying North Carolina leaves, fish, and norns (aliens!) by using the dichotomous keys in your packet. fish Norn NC Leaf

5 CLADOGRAMS: a diagram that shows evolutionary relationships among organisms. Based on PHYLOGENY: the evolutionary history of a species Doesn’t focus only physical characteristics, looks at evolutionary history instead Cladograms can also be called phylogenetic trees.

6 DERIVED TRAITS traits = Characteristics
Derived traits are characteristics or features that are found in later organisms but not in earlier ones. Derived traits are represented as small tick marks on a cladogram with the name of the trait next them. Organisms closer to one another on the tree share a more recent ancestor than the ones farther away from each other. ALL organisms on this cladogram share a common ancestor

7 Derived Characteristics
Practice Derived Characteristics Jaws Lungs Claws/Nails Feathers Fur/M. Glands Hagfish Perch Salamander Lizard Pigeon Mouse Chimp

8 Derived Characteristics
Practice Derived Characteristics Jaws Lungs Claws/Nails Feathers Fur/M. Glands Hagfish Perch x Salamander Lizard Pigeon Mouse Chimp

9 Derived Characteristics
Practice Derived Characteristics Jaws Lungs Claws/Nails Feathers Fur/M. Glands Hagfish Perch x Salamander Lizard Pigeon Mouse Chimp

10 Derived Characteristics
Practice Derived Characteristics Jaws Lungs Claws/Nails Feathers Fur/M. Glands Hagfish Perch x Salamander Lizard Pigeon Mouse Chimp

11 Derived Characteristics
Practice Derived Characteristics Jaws Lungs Claws/Nails Feathers Fur/M. Glands Hagfish Perch x Salamander Lizard Pigeon Mouse Chimp

12 Derived Characteristics
Practice Derived Characteristics Jaws Lungs Claws/Nails Feathers Fur/M. Glands Hagfish Perch x Salamander Lizard Pigeon Mouse Chimp

13 Derived Characteristics
Practice Derived Characteristics Jaws Lungs Claws/Nails Feathers Fur/M. Glands Hagfish Perch x Salamander Lizard Pigeon Mouse Chimp

14 You can also use this table to construct a cladogram!
To help you, you can make a venn diagram. Hagfish perch salamander lizard pigeon mouse chimp Derived Characteristics Jaws Lungs Claws/Nails Feathers Fur/M. Glands Hagfish Perch x Salamander Lizard Pigeon Mouse Chimp

15 Now you can use your venn diagram to fill out the cladogram:
chimp hagfish perch salamander lizard pigeon mouse feathers Fur; Mammary Glands Claws or Nails Lungs Jaws Hagfish perch salamander lizard pigeon mouse chimp Jaws Lungs Claws/Nails Feathers Fur/M. Glands

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