whale mating | whale fight at ghs
whale mating | whale fight at ghs Whale Whales are descendants of land-dwelling mammals of the artiodactyl purchase (even-toed ungulates). They are related to the Indohyus, an extinct chevrotain-like ungulate, from which they will split approximately 48 , 000, 000 years ago.|19||20| Primitive cetaceans, or archaeocetes, first took to the sea roughly 49 million years ago to become fully aquatic 5-10 million years later. What identifies an archaeocete is the presence of anatomical features special to cetaceans, alongside additional primitive features not present in modern cetaceans, such as visible legs or asymmetrical the teeth.|21||22||23||9| Their features became adapted for living in the marine environment. Major biological changes included their ability to hear set-up that channeled vibration from the jaw to the earbone (Ambulocetus 49 mya), a streamlined body and the regarding flukes on the tail (Protocetus 43 mya), the immigration of t...