Question

organisms have embryonic traits that do not appear in the adult form. match the trait to the organism that would have this trait as an embryo but would not have the trait in its adult form. hind limbs gill slits and tail external gills and webbed tail salamanders whales humans

Explanation:

Embryonic traits change during development. Humans have gill - slits and tail as embryos. Whales have hind - limb buds as embryos. Salamanders have external gills and webbed tails as embryos.

Answer:

hind limbs: whales
gill slits and tail: humans
external gills and webbed tail: salamanders