Definition of float in the AudioEnglish.org Dictionary. Meaning of float. What does float mean? Proper usage and pronunciation (in phonetic transcription) of the word float. Information about float in the AudioEnglish.org dictionary, synonyms and antonyms.
Mammals evolved from a group of mammal-like reptiles called the Synapsids, specifically the Therapsids, in the Triassic period, around 250 million years ago.
They come from two different lines of reptiles. Soon after they first evolved reptiles split into synapsids and sauropsids. Mammals evolved from the synapsids while dinosaurs â¦ and the ancestors of all modern reptiles emerged from the sauropsids. Later on the birds emerged as a branch of the dinosaurs.hey are birds. mammals are covered with hair and give live birth and feed them from mammary glands (cows, people, cats, dogs, horses, etc). birds lay eggs and feed their youn â¦ g with bugs and worms.