How are embryos from different species used to support the theory of biological evolution?
- CRRLv 71 month ago
Ernst Haeckel promoted the theory of embryonic recapitulation in which embryos go through stages in which they resemble successive adult stages in the evolution of the animal's remote ancestors. In fact he deliberately overemphasised similarities and was censured for this fraud by his own university.
The shortcomings of the theory had been recognized by the early 20th century, and it had been relegated to "biological mythology" by the mid-20th century. Even as an embryo you never had gills or a tail.
- ZirpLv 71 month ago
Different species share a lot of DNA
embryos go through stages in which they resemble "lower"(=simpler) species. Even you once were a blastula, a morula, a chordate.... you once had a tail...