Hagfish Perch Salamander Lizard Pigeon Mouse Chimp Feathers Fur; mammary glands Claws or nails Lungs Jaws O Mrten Publishing Company Which group (species) has the most derived characteristics?

Feathers, which evolved from modified reptilian scales, show up in the fossil record at the end of the Period. This is the same Period where earlier true mammals also appear in the fossil record and diversify, although they stay quite small and rodent like. Permian Jurassic Cretaceous Triassic

You find a dead animal on the side of the road and are trying to identify it. After externally observing and dissecting it, you can see that it has four legs with sprawling posture, a long tail, a faveolar lung, a heart with one ventricle and a hemipenes. Based on your observations, which of the following statements below is TRUE? This is a Tuatara This is an amphibian It is impossible to know the group of this animal without seeing the number of temporal fenestrae in the skull This is a synapsid This is a squamate

The largest group of vertebrates would be the birds. mammals. osteichthyans. insects.