Listed below are characteristics that serve as evidence of shared ancestry between fish and reptiles. Select the option that applies only to embryos rather than adults.(1 point)

Question

Responses

gill slits that turn into gills
gill slits that turn into gills

scales as a form of skin
scales as a form of skin

hatch from and lay eggs
hatch from and lay eggs

spines and tails

Answer 1

The option that applies only to embryos rather than adults is "gill slits that turn into gills." In the embryonic stage, both fish and reptiles exhibit gill slits, which in fish develop into gills, while in reptiles (and other terrestrial vertebrates), these slits do not develop into functional gills in adults.