A. Introduction The Killer Whale or a.k.a the Orca is a toothed whale belonging to the oceanic dolphin family, of which is the largest member. First found in the cenozoic period. It belongs to the mammal family, Phylum-Chordate, order-even-toed ungulate, genus-orcinus, kingdom-"animal".
B. Morphological/Molecular The Killer Whale is closely related to the dolphin and your average whale figure. They both have fins, both need to breath fresh air, through their similar blowholes. Only about 80% in common. They both have to a special blowhole that helps in order to breath fresh air, and they each have that in common.
C. Homologous Structures The two animals that have a similar homologous structure, is the whales fin and the wolfs leg, and the structure of the whales jaw and wolfs jaw, and a bat. They each have a curved jaw, which specials in their same eating habitats. which could seem that they came from a same environment.
legs of all human,cat,whale, bat.
jaws of whale and dog
fins and legs of animals
wolfs jaw and whale jaw
D. Vestigial Structures Back when they first existed, whales and the closely related animals, had legs, not really legs, legs as if a crocodile. Because back then they needed to get their air from the real outside, so just like hippos they would go out to get air and eventually go back in the water.
E. Transitional Fossils since back then, whales used to have crocodile legs, the bone structures was different, showing the difference of the structures back then. Transitional fossils are the transition of the whales fossil to what it started with, to the "transition" into what it is now. this shows evidence of evolution because they evolved from one thing to another.
When first existed
Now still existing..
F. Comparative Embryology Back then the embryos were a lot smaller, and when born were only a certain size, now they have developed a lot and now are a much bigger size to help mark their place in the food chain in the ocean world.