Sentences with phrase «legged vertebrate animals»
Not exact matches
Because skates are an evolutionarily ancient animal, that means the neurons essential for walking originated in species that separated from other four - legged vertebrates, or tetrapods, about 420 million years ago.
http://www.sciencemag.org/
By comparing the genomes of 203 vertebrates, they first traced the origin of KZFPs back to a common ancestor of tetrapods (four - legged animals) and coelacanth, a fish that evolved over 400 million years ago.