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

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 not visible during embryonic development, which suggests that humans evolved to not depend on their tailbone serving a useful purpose.

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 embryonic cells that dev

Question

Which of the following provides the best example of how comparative embryology supports the theory of evolution? 

 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 not visible during embryonic development, which suggests that humans evolved to not depend on their tailbone serving a useful purpose. 

 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 embryonic cells that dev

anonymous · Answer

in a predictable way, which suggests that other organisms also evolved to develop in the same manner

anonymous · Answer

Which ones can you eliminate right away?

anonymous · Answer

the third @Calliope

anonymous · Answer

Why would you eliminate that one?

anonymous · Answer

we dont have gill slits?

anonymous · Answer

Adults don't, but what about embryos?

anonymous · Answer

that wasnt in my lesson...

anonymous · Answer

It might be a general knowledge thing. Technically, embryos don't have gill SLITS, but they do have folds that are commonly called gill slits because they're homologous to the structures that turn into gills in fish.

anonymous · Answer

so what would the answer be? im confused...

anonymous · Answer

Ok... the first one is obviously wrong because birds definitely have embryos: the yolk is the food source for the developing embryo.

The second one is wrong, because a) the tailbone does have a function (some muscles attach there, I think), and b) it's VERY visible during embryonic development: at some stages, it looks like the embryo has a little tail.

I already talked about the third one...

And the fourth one doesn't really say anything useful. Of course all multicellular animals develop in a predictable way, and I suppose this ability must have evolved in a common ancestor somewhere, but if that's the only thing you notice about human development, you aren't going to get very far with comparative embryology.

anonymous · Answer

so the third one?

anonymous · Answer

Do you understand what I wrote there?

anonymous · Answer

yes i do thanks

anonymous · Answer

Then you have your answer :)