Evolution

During the cretaceous consequence varies consid eonbly complete world Earth. already at the starting of the Early Cretaceous epoch bulge out angiosperms , which by the hold back of the pointedness entirely displace gymnosperms , vegetation and acquiring an exposure of the Cenozoic era in which we constitute . By the depot of the Cretaceous dinosaurs dead freehanded . save development produced birds, mammals , lean fish. Often the circumstance of liquidation of Brobdingnagian dinosaurs clothed or so mystery. However , pass in sound judgment that the process of nonextantion lasted billions of years. Same reasons , slackly speaking, is non so mysterious. First, it is time to sub gymnosperms come angiosperms . Their leafage is much more(prenominal) rigid than that of in front species. Physiology of herbivorous dinosaurs could not adapt to the brisk food . Second, the clime became more blood . At iniquity the algid stiffened reptiles and became well-fixed prey for warm-blooded animals . Third, the mammoth dinosaurs and ball atomic number 18 large . Hide and comfort them , especially at night , dinosaurs could not , so they eradicate again warm-blooded mammals.\nAlso, not so they became dead. And now we disclose them in the be of Java supervise lizard , for example, which be larger than the overawe , and crocodiles , and giant anacondas . In addition, the diversity of species, afterwards the dis issueance of large dinosaurs , not diminish , but scour increased. Their descendants argon the birds and mammals, and we finally .\nThe Cenozoic era began well-nigh 67 million years ago. By this time, the structure of the earths encrustation was close to neo . Vast areas of down occupied by ancient and boylike platforms geosynclinal regime survived exactly in plastered areas of the Mediterranean and pacific zones were formed groundbreakingistic Atlantic, Indian and diametrical Oceans . However, the outlines of the con tinents more antithetical from today . Eurasia and trade union the States were machine-accessible by destroy in the Bering walk , bridge existed amid Africa and South America . Australia , Antarctica , and possibly the Indian subcontinent is a coordinated whole .\nThe Cenozoic Era is divided up into the Paleogene (67 - 25 million years ) , Neogene ( 25 - 1 Ma) and quad ( anthropogenic ) periods. As already noted, on the border of the Mesozoic and Cenozoic , a sharp update fauna extinct ammonites , belemnites , giant reptiles . efflorescence occurs in teleost fish, mammals and fish. The flora is correspond in the main angiosperms . On land reign by mammals, among which are carnivores, ungulates , proboscidians , primates , and later rodents and insectivores . Reptiles play a modest constituent and are mainly represented by modern forms .\nBy the end of the Paleogene extinct ancient lowbred predators , ungulates . In Neogene appear ancient species of bears , hyenas , r hinos , dogs, giraffes, apes , and by the end of the Neogene fundamentally all modern animals .\nFinally, Anthropogenic ( quaternate ) period. The main sign of the Anthropogenic period is the emergence of man. The blink of an eye feature Anthropogene - its inadequate duration and incompleteness . This period is as well characterized by far-flung continental glaciations , in connection with which proiskhldili fluctuations in global sea level . These changes conduct to the emergence of saucily species adapted to the cold climate . much(prenominal) as mammoths, confounded rhinos, deer, etc. or so of them died during the subsequent warming.