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3 giorni fa · The brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals. It consists of nervous tissue and is typically located in the head ( cephalization ), usually near organs for special senses such as vision, hearing and olfaction.
3 giorni fa · Pterosaurs are the earliest vertebrates known to have evolved powered flight. Their wings were formed by a membrane of skin, muscle, and other tissues stretching from the ankles to a dramatically lengthened fourth finger. [9] There were two major types of pterosaurs.
2 giorni fa · Boles et al. (2024) describe a new assemblage of vertebrate microfossils from the Cretaceous-Paleogene transition from the Hornerstown Formation (New Jersey, United States), providing evidence of slow recovery of elasmobranchs and ray-finned fish after the Cretaceous–Paleogene extinction event.
3 giorni fa · This course prepares students for advanced courses on the biology of fishes, amphibians and reptiles, birds, and mammals; pre-vet and pre-med students benefit from its comparative anatomical approach to understanding the organization of the vertebrate body.
Rapid ecological speciation is often associated with natural or sexual selection (see, e.g., refs. 42 and 43 ), but here we show that nonecological speciation ( 44) by isolation and drift can produce incipient species within a few thousand generations. The rapid divergence between ESUs has conservation implications.
3 giorni fa · Vertebrates are a diverse group of animals that share one common feature: they all have a backbone or spine. From mammals to birds, reptiles to fish, and amphibians to humans, vertebrates are found in various shapes, sizes, and habitats around the world.
5 giorni fa · Vertebrates are animals with a backbone, also known as a spinal column. They make up most of the phylum Chordata, one among 38 animal phyla. All other phyla are exclusively invertebrate. A couple members of phylum Chordata, lancelets and tunicates, are invertebrates.
