There's nothing magical about the number, yet five digits at the end of their limbs is a motif that runs through all the animals with four limbs, called tetrapods. Even when there are fewer than ...

Cladistics is one way scientists classify organisms. A cladogram shows the nature of evolutionary relationships that may have occurred, similar to a family tree. You will make a cladogram in this ...

Ian Jenkins, Geological Magazine 7. A review of the British Middle Triassic tetrapod assemblages Michael J. Benton, Geoffrey Warrington, Andrew J. Newell and Patrick S. Spencer 8. Small tetrapods from ...

"The thing that really stuns me is that every innovation, every invention used by tetrapods on land, originally appeared in some form in fish, including lungs, appendages, and now, feeding," said ...

Because all later land vertebrates, or tetrapods, can be traced back to a fish. This encompasses not only amphibians, reptiles and birds, but also mammals—humans included. Yet one mystery ...

Lobe-finned fishes like coelacanths are more closely related to tetrapods than to ray-finned fishes (Actinopterygii), which make up about 99% of the known fish species. Tetrapods include birds, ...

Cladogram: a branching diagram that represents only phylogenetic relationships among organisms (i.e., it does not include geological age or other contextual information). Formally, a cladogram is ...

The sequencing of the platypus genome has received a high amount of misleading press attention. What does this information really tell us about this strangely unique animal and its genetic past?

This was the proatlas. Pieces of the proatlas are found in the skulls of some extinct amphibians, in crocodiles and in the embryos of many tetrapods. The next vertebra changed as well. This vertebra, ...

Parsis who visited the site recently said that a mud embankment and tetrapods will block seawater from reaching the steps. They have said that a metal plaque that commemorated the history of the ...