Suomalaiset tiedemiehet oli mukana todistamassa miljoonien vuosien evoluutiota labrassa.
> A group of researchers from the University of Helsinki and the Universitat Autònoma de Barcelona have been able experimentally to reproduce in mice morphological changes which have taken millions of years to occur.
The researchers observed that the teeth formed with different degrees of complexity in their crown. The more primitive changes observed coincide with those which took place in animals of the Triassic period, some two hundred million years ago. The development of more posterior patterns coincides with the different stages of evolution found in rodents which became extinct already in the Palaeocene Epoch, some 60 million years ago. Researchers have thus achieved experimentally to reproduce the transitions observed in the fossil registry of mammal teeth.
http://phys.org/news/2014-07-scientists-evolutionary-embryonic-mice.html
> A group of researchers from the University of Helsinki and the Universitat Autònoma de Barcelona have been able experimentally to reproduce in mice morphological changes which have taken millions of years to occur.
The researchers observed that the teeth formed with different degrees of complexity in their crown. The more primitive changes observed coincide with those which took place in animals of the Triassic period, some two hundred million years ago. The development of more posterior patterns coincides with the different stages of evolution found in rodents which became extinct already in the Palaeocene Epoch, some 60 million years ago. Researchers have thus achieved experimentally to reproduce the transitions observed in the fossil registry of mammal teeth.
http://phys.org/news/2014-07-scientists-evolutionary-embryonic-mice.html
Vastaukset
Vanhimmat
Ei vielä vastauksia
Aloittaja odottaa vastauksia. Kerro oma näkemyksesi ensimmäisenä.