Give examples of embryological evidence for the evolution of chordates and explain the significance of this evidence for science.

All chordate embryos in the early stages of development have
1) gill slits
2) the rudiments of the tail
3) one circle of blood circulation and a two-chamber heart
4) chord
5) neural tube
6) based on the study of the stages of development of embryos, conclusions can be drawn about the evolutionary relationship of organisms.

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