Question: answer Practice: Phylogenetic Trees #1 Answer the questions about each tree below. 1. In the diagram to the right, which node represents the most recent

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Practice: Phylogenetic Trees #1 Answer the questions about each tree below. 1. In the diagram to the right, which node represents the most recent common ORGANISM D ancestor for organisms B and C? ORGANISM B ORGANISM C ORGANISM A NODE 3 2. Which node represents the most recent common ancestor for A and C? NODE 2 NODE I 3. Which organism is B more closely related to, A or C? Explain. 4. Which organism is B more closely related to, C or D? Explain. Which tree above shows a different evolutionary history from the others? Explain the difference. What characteristic do all of the organisms in the tree to the right have in common? RAY-FINNED FISH LAND VERTEBRATES LAMPREYS SHARKS LUNGFISH AMPHIBIANS What characteristic is common to only amphibians and land vertebrates? FINGERS AND TOES THOANAL BONY RIBS AND SHOULDER GIRDLE What characteristic(s) do sharks and lungfish have in common? JAWS VERTEBRAE Who is the ray-finned fish more closely related to - sharks or lungfish? Explain. re lungfish more closely related to amphibians or land vertebrates? Explain

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