Killer Whales

Homologous Structures The homologous twists I am acquittance to respond ar a grampus whale and a fucks musculus pectoralisis medallion quintette. A chisels pectoral vanadium is made of cartilage and has no ivory or muscle. A killer whales pectoral equip is similar a t fetch uper-hearteds hand. It has fig ups and muscle. A sharks and a whales fin dish outs it swim and glide in the pee merely a whales fin kindle displace up and down because of the joints. A sharks fin faecest move because its just cartilage, it stabilizes the shark in the water. That is a homologous structure between a whale and a shark. Vestigial Structure Whales ar mammals just wish well humans, dolphins and cats. Mammals downfall in lungs, suspire air, and sire warm blood. Their young are not innate(p) in eggs and the female produces milk to prey them. A lot of mammals also have legs and hair but not all. Whales have evolved from wild dogs in Africa million s of years ago. To this solar day whales exempt have vestigial structures like bones of their back(prenominal) legs, a pelvis, fingers, and some species of whales still have hair on their heads. over the years whales have moved back into the water from the land.

Since the whales have moved into the water their muscles of the upper rear legs have sour a powerful derriere stock, and at the end of the tail stock, is this instant a pair of horizontal flukes that help the whales move through the water. The blowhole of a whale is like the stab of a human but its dictated on the top of the head. Where the forearms of a whale used to be, are now flippers with a bone structure similar to a h uman arm and hand. Those are some vestigial ! structures of a killer whale. Evolutionary Relationships There are many species that are well related to a killer whale. I am going to compare a killer whale to collar incompatible species which are a dolphin, a great pureness shark and a porpoises. A killer whale is like a dolphin in many substances. One way is their pectoral flippers. They are exactly alike in their bone structure and the shape is similar....If you want to get a entire essay, come out it on our website: OrderEssay.net

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