Jawless Fish were first, then jawed fish, then fleshy finned, ray-finned and other modern jawed fish evolved, amphibians and sharks were evolving at about the same time, reptiles evolved from amphibians, mammals and birds were both evolving at about the same time( both from reptiles), dinosaurs were also evolving at this time and about 100 million years later the asteroid hit the Earth and Mammals started to takeover where dinosaurs had been and 200000 years ago we evolved.
Fish - amphibians - reptiles; and from the reptiles birds and mammals.
In evolution the study of vertebrate forelimbs is related to the anatomical evidence from homology.
In evolution the study of vertebrate forelimbs is related to the anatomical evidence from homology.
convergent evolution
fish
All vertebrate embryos look roughly the same, showing that they come from a common ancestor.
The longest stage of stellar evolution is the main sequence phase.
vague.
Death sorch
Main Sequence
4 chambered heart
Evolution of paired limbs was one of major developments . Similarly development of jaws , Amnion etc are also major developments .
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