Question

Which of the following provides the best example of how comparative embryology supports the theory of evolution?

Answer 1

Humans do not lay eggs as birds do, but birds produce yolk sacs instead of embryos, suggesting birds evolved later than humans.
Humans have a tailbone that is visible during embryonic development, which suggests that humans evolved to depend on a useful tailbone.
Humans do not have gills as fish do, but human embryos have gill slits, suggesting humans and fish share a common evolutionary ancestor.
Humans have stem cells that develop in an unpredictable way, which

Answer 2

Generally, any feature of embryology that is found in two different types of animals suggests that they share a common ancestor.