145k views
1 vote
Which of these characteristics is common only at the embryonic stage of fish and humans, and is suggestive of a common ancestor between the two?

1 Answer

3 votes
The embryos of many kinds of animals have gills slits. Gill slits developed into gills in fish and into ears of mammals. Relating in thinking there are ancestors.
User Haytham
by
5.2k points