Question

Fish, amphibians, reptiles, birds, and mammals have similar embryos.
They all start with gill slits. Fish and some amphibians grow to have gills. Some amphibians, reptiles, birds, and mammals develop lungs to breathe air.
They all start with tails. Fish, some amphibians, reptiles, and birds grow tails. Humans do not keep their tails.
Fish and reptiles develop scales. Amphibians, birds, and humans have skin. Birds have feathers, and humans have hair.

With which animal do humans exhibit the most linear relationship?(1 point)
Responses

fish
fish

birds
birds

amphibians
amphibians

reptiles

Answer 1

birds

Humans and birds share embryonic gill slits and tails, and both develop lungs and skin (so their developmental pattern matches most closely).