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of whale ancestors found in the fossil record Note that the species are not listed in the order in which they evolved Ambulocetus Tiny hooves at toe Hands and feet shaped like paddles Short hind limbs adapted for swimming Ears specialized for underwater hearing Long snout with nostrils in middle Features of Ancient and Modern Whales Dorudon Rodhocetus Pakicetus Sturdy flippers Tiny weak hind legs Pelvis disconnected from backbone Ears adapted for underwater hearing Nostrils shifted to top of head Tiny hooves at toe Webbed feet Legs disconnected from the pelvis Ears specialized for underwater hearing Nostrils in middle of snout Species Species Species Species Species Hooved feet Sturdy flippers Ears intermediate between that of terrestrial and fully aquatic animals Nostrils at tip of snout Modern whales b Draw a concept map in the space below 2 points i Show the order in which the species evolved No visible hind legs a These diagrams illustrate the bodies of the five whale species described in the table above The gray silhouette shows the overall body size of each species while the black outline shows the skeletal structures Use the table of features to label each diagram with the species name 1 point Pelvis disconnected from the backbone Ears adapted for underwater hearing Nostrils fused into blowhole at top of head ii Label a species with a vestigial structure and the species with the ancestral feature it descended from c Based on what you know about natural selection what most likely caused the changes that occurred between Pakicetus and Ambulocetus 2 points d Explain how the fossil record of whales serves as evidence to

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