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Há 2 dias · Crocodilia (or Crocodylia, both / krɒkəˈdɪliə /) is an order of mostly large, predatory, semiaquatic reptiles known as crocodilians. They first appeared 94 million years ago in the Late Cretaceous period ( Cenomanian stage) and are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria.
Há 2 dias · A multistate outbreak of HPAI A (H5N1) bird flu in dairy cows was first reported on March 25, 2024. This is the first time that these bird flu viruses had been found in cows. On April 1, CDC confirmed one human HPAI A (H5N1) infection in a person with exposure to dairy cows in Texas that were presumed to be infected with the virus.
Há 5 dias · Organic evolution can be of eight types that are: Divergent, Co- evaluation, progressive, mega evolution, parallel evolution, microevolution, macroevolution, and convergent evolution. The convergent evolution is also known as the parallel evolution. It is the geographical area which includes similar groups of plants and animals.
Há 1 dia · Domestication of the dog. The dog diverged from a now-extinct population of wolves 27,000–40,000 years ago immediately before the Last Glacial Maximum, [1] [2] when much of the mammoth steppe was cold and dry. The domestication of the dog was the process which led to the domestic dog. This included the dog's genetic divergence from the wolf ...
Há 1 dia · This is because mammals have imprinted genetic regions, where either the maternal or the paternal chromosome is inactivated in the offspring in order for development to proceed normally. A mammal created by parthenogenesis would have double doses of maternally imprinted genes and lack paternally imprinted genes, leading to developmental abnormalities.
Há 4 dias · Research into the origin of life. Learn how certain small molecule interactions may have been responsible for the life itself. You will find scientific theories and findings here.
Há 2 dias · They also excrete creatine, rather than creatinine like mammals. This material, as well as the output of the intestines, emerges from the bird's cloaca. The cloaca is a multi-purpose opening: waste is expelled through it, most birds mate by joining cloaca, and females lay eggs from it.
