Amphibians
An axolotl is a salamander in the larval stage. They live in the water, so they need to have gills to breathe.
Yes, especially in the larval stage. Most species lose their gills when they become an adult, but there are some exceptions.
As the amphibian goes from larval to tadpole stage it losses its gills and develops lungs to breathe air and also limbs are formed to walk better on land in case of frogs
frogs with gills a frogs with gills are called a tadpole
CATERPILLAR
No, reptiles do not have a larval stage. Unlike some amphibians and insects, reptiles hatch from eggs in a form that resembles miniature adults. They do not undergo metamorphosis like amphibians that have larval stages such as tadpoles.
Many amphibians, such as frogs, possess gills in their larval stage (tadpoles) and develop lungs as they transition to adulthood. This remarkable transformation, known as metamorphosis, allows them to adapt from an aquatic environment to a terrestrial one. As they mature, their gills are reabsorbed, and they develop the ability to breathe air through lungs.
Not all amphibians do, some salamanders are live-bearers and some frogs lack a larval stage, they leave their egg as a small frog. Most amphibians do have a larval stage with gills, some will never drop the gills (neonetism) and most frogs and some salamanders will develop lungs. Most salamanders dont have lungs and breathe through their skin. There is no specified reason for having gills and lungs at different stages of their life cycle; apparently it is a good strategy. If it wasn't, frogs would be extinct ;)
The term for the retention of larval or other juvenile characteristics into the adult stage is neoteny. This phenomenon can result in adult organisms retaining features like gills or immature reproductive organs.
Pollywogs are also known as tadpoles, which are the larval stage of an amphibian, most commonly a frog or toad. During this stage, they have gills and a tail for swimming, before eventually developing into adult frogs or toads.
Yes they do.
planula