Question

what is short in fishes and davians but but much longer in amniotes​

Answer 1

Answer:

The anamniotes are an informal group comprising the fishes and the amphibians, the so-called "lower vertebrates", which lay their eggs in water. They are distinguished from the amniotes, the "higher vertebrates" (reptiles, birds and mammals), which lay their eggs on land or retain the fertilized egg within the mother.

Pronephros becomes lymphoid in function in other vertebrates. Also called the Wolffian body, mesonephros is the functional kidney of the larvae as well as the adults of fish and amphibian and functional kidney in the embryonic stage of amniotes, i.e. reptiles, birds and mammals.

Explanation: