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They evolved from a branch of reptiles known as the diapsids (for the two open areas in their skulls); those, as well as all other reptiles, evolved from amphibians, and the amphibians from bony fish. As each step goes further into the past, the uncertainty of the specific ancestors increases, but the fish may have evolved from crawling creatures on the bottom of the seas similar to the arthropods. Anthropods probably evolved from worms and worms from simpler forms similar to cnidarians. These had no hard anatomy and left few if any fossils, but it's presumed that the lineage eventually finds its way back to single-celled creatures.
Incidentally, the division in the Reptiles that produced the dinosaurs (the diapsids) also produced the synapsids, a branch that eventually led to humans.
Wiki User
∙ 10y ago
Wiki User
∙ 13y agoThe Tyrannosaurus came into existence when a Velociraptor and a Brontosaurus GOT IT ON!
Wiki User
∙ 12y agoI would think they came into existence when God created earth that's how all other life came into existence so I don't think dinosaurs would be any different.
Wiki User
∙ 14y agoalbertosaurus
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Can Dinosaurs come back to life with sausages?
No.
What was the first animal to come to earth?
Lizards(dinosaurs)
What was the first animal to come to the earth?
Lizards(dinosaurs)
Were dinosaurs or birds the first beings?
Dinosaurs came before birds, because dinosaurs later on evolved into birds, therefore, making birds come along LATER then the dinosaurs. However dinosaurs were far from the first creatures on earth.
Will dinosaurs come back?
Some people believe that dinosaurs will come back in their life time. Some people believe that they will come back after there life time. Some people believe they will be cloned. Some people believe, that they will never come back. What ever you believe, you can believe. But I believe that dinosaurs will not come back ever, but will be cloned outside of my lifetime. - Christopher250 -
What is thefirst life on this earth?
dinosaurs were the first creatures to be on this planet.
Will dinosaurs come back to life when humans die?
No they won't. They can't resist the cold.
What was the first sign of life in water?
fish or dinosaurs = ages ago
What kind of dinosaurs did the shark come from?
Yes, there were! In fact, sharks were around even beforethe dinosaurs!
What was the name of the movie where people go to an amuesment park where dinosaurs come back to life?
Jurassic Park
Who came first dinosaurs or egg?
dinosaurs
Who came first the dinosaurs or the Victorians?
The dinosaurs.
