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The researchers propose that tetrapods, four-legged animals, may have evolved complex parenting behaviour in a similar way when they moved from living in water to colonise the land.
An index developed initially by Del Monte-Luna & Lluch-Belda (2003) was used for tetrapods and fish to calculate the vulnerability index at the order level (ViO).
The evolution of tetrapods - four legged vertebrates- from fishes was a key event in human ancestry and for a long time scientists have assumed that they had originated in Laurasia - the smaller supercontinent which included modern day North America, Greenland and Europe.
The Khovanshchinian basin within the Moscow Syneclise was populated by foraminifers, ostracods, gastropod and bivalve molluscs, brachiopods, 'serpulid worms' (microconchs), charophytes, conodonts, as well as various fishes and early tetrapods; it is also characterized by numerous stromatolitic structures (Reutlinger 1960; Rodionova et al.
The diameter of the tetrapods' legs decreases from the center up to de tip.
franconicus was originally thought to have been produced by two or more tetrapods, but we interpret it as having been generated by a single track maker.
"The seafronts in Dbayyeh [north of Beirut] and Beirut are OK because they have concrete blocks in place," he said, referring to the eight-headed tetrapods that act as breakwater and protect the coastline.
When increasing the Se content in CdSeTe tetrapods (TPs), the band level positions between the polymer donor and the NCs acceptor may be modified, thereby promoting the open circuit voltage ([V.sub.OC]) and [J.sub.SC] .
A considerable part of the introduction is devoted to a discussion of the vernacular model Nova Rada (convincingly identified as the vernacular model referred to by Dubravius himself as libellus patrio sermone scriptus), in which tetrapods and birds instruct their king, the lion, in matters of life and government.
Extra activities include a boat trip to Skelligs, canoeing, cycling, surfing and panoramic walks, visiting the tetrapods.
Those fossils include not only the bones of these early tetrapods - animals with a spine and four limbs - but also their footprints left as they slithered across muddy flats.
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- Tetrahymena pyriformis
- tetralogy of Fallot
- tetramethylammonium iodide
- Tetratrichomonas ovis
- tetra-X syndrome
- tetrazonium salts
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- Tetraplegic Spinal Cord Injured
- tetrapotassium pyrophosphate
- Tetrapropylammonium perruthenate
- Tetrapterus albidus
- Tetrapturus albidus
- Tetrapturus audax