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21 de abr. de 2008 · Italian wall lizards introduced to a tiny island off the coast of Croatia are evolving in ways that would normally take millions of years to play out, new research shows.
The main points to the transition from reptile to bird are the evolution from scales to feathers, the evolution of the beak (although independently evolved in other organisms), the hallofication of bones, development of flight, and warm-bloodedness.
Lizards in an Evolutionary Tree is one of three films in HHMI’s Origin of Species collection. This film describes how the more than 700 islands of the Caribbean are home to about 150 species of anoles, a closely related group of lizards (genus Anolis) that occupy diverse habitats and niches.
Evolution and paleontology. Historical development. body plans of extinct reptiles. A selection of body plans of extinct reptiles. The first land vertebrates, the Tetrapoda, appeared about 397 million years ago, near the middle of the Devonian Period.
6 de oct. de 2020 · In it, researchers show that the evolution of extinct lineages of reptiles from more than 250 million years ago took place through many small bursts of morphological changes, such as developing armored body plans or wings for gliding, over a period of 50 million years instead of during a single major evolutionary event, as previously thought.
12 de nov. de 2013 · Description. This film explores the adaptation of anole lizards (genus Anolis) to habitats common across the islands of the Caribbean. The anoles are excellent examples of adaptive radiation, convergent evolution, and speciation through reproductive isolation.
Embryonic development and sex determination. Viviparity, or the birthing of live young, occurs in some lizard species. For skinks, this is true for about one-third of the species, many of which live in tropical climates.
