DICHOTOMOUS KEYS: a set of paired statements that describe physical

DICHOTOMOUS KEYS: a set of paired statements that describe physical characteristics of different organisms

DICHOTOMOUS KEY: NAME THAT POTATO CHIP! ? ? ? ? ? ? ?

NOW IT’S YOUR TURN TO PRACTICE USING A DICHOTOMOUS KEY!! actice classifying North Carolina leaves, fish, and norns (aliens!) by using the dichotomous keys in you packet. fish NC Leaf Norn

Using the cladogram, answer the following on p. 139 in your notebook. 1. How many derived characteristics are represented on the diagram above? 2. Which animals have claws or nails? 3. Which animals have jaws? 4. How many derived characteristics separate hagfish form chimps and what are they?

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

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.

PRACTICE Derived Characteristics Jaws Lungs Claws/ Feathe Nails rs Hagfish Perch Salaman der Lizard Pigeon Fur/M. Glands

PRACTICE Derived Characteristics Jaws Lungs Claws/ Feathe Nails rs Hagfish Perch Salaman der Lizard Pigeon x Fur/M. Glands

PRACTICE Derived Characteristics Jaws Lungs Claws/ Feathe Nails rs Hagfish Perch Salaman der Lizard Pigeon x x x Fur/M. Glands

PRACTICE Derived Characteristics Jaws Lungs Claws/ Feathe Nails rs Hagfish Perch Salaman der Lizard Pigeon x x x x x x Fur/M. Glands

PRACTICE Derived Characteristics Jaws Lungs Claws/ Feathe Nails rs Hagfish Perch Salaman der Lizard Pigeon x x x x x x x x x x Fur/M. Glands

PRACTICE Derived Characteristics Jaws Lungs Claws/ Feathe Nails rs Hagfish Perch Salaman der Lizard Pigeon x x x x x x x x x x x x Fur/M. Glands x x

PRACTICE Derived Characteristics Jaws Lungs Claws/ Feathe Nails rs Hagfish Perch Salaman der Lizard Pigeon x x x x x x x x x x x x Fur/M. Glands x x

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/ Feathe Nails rs Hagfish Perch Salaman der Lizard Pigeon Mouse Chimp x x x x x x x x x x x x x x x Fur/M. Glands x x x

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