2006-07-10 10:07:31 · 4 answers · asked by sandou2004 1 in Science & Mathematics ➔ Biology
Many organisms have very similar embryos. This means that the portion of DNA that codes for the embryonic stage is very old has been changed very little in billions of years, and basically is more evidence that all organisms come from a common ancestor. This is of course the main concept of evolution.
2006-07-10 10:24:46 · answer #1 · answered by Jeff 3 · 0⤊ 0⤋
The idea that embryos go through the stages of evolution is now pretty much debunked, but there are still some things that we can tell from the way that the embryo forms. If the embryo forms mouth first, then anus, or anus first then mouth allows biologists to trace organisms with similar backgrounds to create hierarchies. This can give insight to the timeline of separation of species.
see deuterostomes/protostomes
2006-07-10 10:18:40 · answer #2 · answered by Loulabelle 4 · 0⤊ 0⤋
I'm assuming you mean vertebrate embryo . . . they tell the tale of our evolutionary history as all vertrebrate embryos look the same at first and only start to specialize about halfway through the term.
2006-07-10 10:15:06 · answer #3 · answered by Isis-sama 5 · 0⤊ 0⤋
alot for example humans have a tail not to mention we bed appendages. these features are fazed out as we continue to develop. Many organisms show there evolutionary history while they develop.
2006-07-10 10:14:14 · answer #4 · answered by James R 2 · 0⤊ 0⤋