WebWhales today still bear the marks of their ancient land ancestors—they retain tiny remnants of hind leg bones in their hip region. Fossils of Basilosaurus were found in the United States in 1840s, and the … WebCetaceans have fewer bones than humans, mainly because they don’t have legs or feet. Including the individual bones that make up the skull, our sperm whale has 184 bones...

The strange tale of the leg on the whale - creation.com

WebHumans, whales, lizards, and birds all have differently shaped forelimbs, reflecting their different lifestyles. But those different forelimbs all share the same set of homologous bones — the humerus, the radius, and the ulna. These same bones can even be seen in fossils of the extinct lobe-finned fish, Eusthenopteron. Such homologies reveal the common ancestry WebThere aren’t any bones or cartilage in the dorsal fin and flukes. Instead, they’re made up of dense connective tissue. Longitudinal muscles in the back and caudal peduncle move the flukes up and down. The Orca’s pectoral fins are paddle-shaped. ... Killer Whales 101. 3:42. Sea Otter Anatomy. 2:26. Seals 101. 3:44. Seal Anatomy. show answer traductor

The evolution of whales - Understanding Evolution

WebThe Gray whale is one of the oldest mammal species on the planet. It has evolving and adapting for 30 million years. This marine mammal is a baleen whale, and all baleen whales have two blowholes. The blowholes are connected directly to the lungs, so the whale can take a mouthful of water and breathe at the same time. WebYes, they certainly do. Whales have giant bones that give their large bodies structure, provide their organs with protection and help them dive when needed. Whales have a lot fewer bones than we humans as they … WebThough some whales still have free floating vestigial pelvic bones. Hippos are the closest living relatives of whales, but they are not the ancestors of whales. Both hippos and … show annotations