What similarities in development lead scientist to infer that vertebrate species share a common ancestor??
2007-01-22 15:06:03 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Zoology
i dont know
2007-01-22 15:08:51 · answer #1 · answered by Fasha 2 · 1⤊ 0⤋
As the fertilized egg starts to develope it forms a primitive backbone(the basis of verebrate definition) The tadpole like shape then developes into arms and legs for legged creatures. Gill like structures get tucked into the main body and form the lung like apparttus of breathing creatures. By closely recording the stages of various appendages and organs scientist can determine how similar another creature is to another creature and their likely evolution position the creature can be placed on an evolutionary common ancestor tree.
2007-01-22 15:41:08 · answer #2 · answered by Philip H 3 · 0⤊ 0⤋
The formation of the notochord, bilateral symmetry, and the formation of the anus from the blastopore.
2007-01-22 15:15:16 · answer #3 · answered by Philippe 3 · 0⤊ 1⤋