Fish, amphibians, reptiles birds and mammals have similar embryos. They all start with gills 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 skills, amphibians, birds, and humans have skin birds, have feathers, and humans have hair, which of the following animals exhibit the most nonlinear relationship as compared to the rest?

Question

Amphibians
fish
birds
reptiles

Answer 1

Birds exhibit the most nonlinear relationship compared to the rest of the animals mentioned. This is because birds, unlike the other animals, have feathers and are adapted for flight, whereas the other animals (amphibians, fish, and reptiles) do not have this characteristic.