Why don t amphibians have scales like fish and reptiles do?

Reptiles have scales, and their skin is dry. Amphibians do not, and their skin is often moist with mucus, which keeps them from drying up. But no amphibians have scales. More on skin later.

How is an amphibian different from a fish or a reptile?

One difference between reptiles and amphibians is their relationship with water. In addition, most amphibians lay their eggs in water. Reptiles, on the other hand, do not have to spend part of their lives in water, although they do often live near water and spend time in water. Take frogs, for example.

Do amphibians have scales?

Due to this scales are not present on the body of amphibians. They have scales on their body. Some reptiles have hard protective scales on their skin.

Are amphibians closer to fish or reptiles?

Reptiles are actually more closely related to birds and mammals than amphibians. Amphibians are best known for laying their gelatinous eggs in the water. Tadpoles, the larvae of frogs, resemble fish with their fins and gills for breathing underwater.

Why amphibians do not have scales?

Amphibians are frogs, toads, newts and salamanders. Most amphibians have complex life cycles with time on land and in the water. Their skin must stay moist to absorb oxygen and therefore lacks scales.

What is a characteristic of amphibians but not of reptiles?

They are vertebrates and cold blooded like amphibians. As compared to reptiles, amphibians have smooth skin. The skin of most amphibians is not water-proof unlike reptiles. Although most of the amphibians have lungs, they usually breathe through their skin and lining of their mouth, whereas most reptiles do not.

What amphibians have scales?

There are no amphibians that have scales on their bodies. Reptiles are the group of animals that often resemble amphibians, and they have tough,…

How did amphibians evolve from fish?

The earliest amphibians evolved in the Devonian period from sarcopterygian fish with lungs and bony-limbed fins, features that were helpful in adapting to dry land. They diversified and became dominant during the Carboniferous and Permian periods, but were later displaced by reptiles and other vertebrates.

What are the difference between amphibians and reptiles Brainly?

The main difference between Amphibians and reptiles is that Reptiles are land animals whereas amphibians live both on land and in water. Amphibians can breathe both through gills and lungs while reptiles breathe through lungs only.

Is a fish an amphibian?

Amphibians are vertebrates (animals with backbones) which are able, when adult, to live both in water and on land. Unlike fish, they can breathe atmospheric oxygen through lungs, and they differ from reptiles in that they have soft, moist, usually scale-less skin, and have to breed in water.

Is a fish a reptile?

A fish is an animal that lives only in the water, whereas a reptile lives in both land and water. A fish is an aquatic vertebrate that is cold blooded or ectothermic. Some examples of fish are lamprey, sharks, ray fish etc, while lizards, crocodiles, snakes, turtles etc are reptiles.

Why don’t amphibians have scales?

Amphibians don’t have scales because they lost them compared to the ancestral species. They lost them because they evolved to use their skin for respiration – they can breathe right through their skin. Scales would get in the way of this, so they don’t have them.

Why are amphibians important to a pond?

The presence or absence of amphibians in a pond or stream is an excellent indicator of its water quality. Reptiles’ impermeable scales protect them from many pollutants and other toxins in water, on land and even in the air that an amphibian could absorb and be affected by.

What is the difference between an amphibian and a reptile?

Reptiles have scales, and their skin is dry. Amphibians do not, and their skin is often moist with mucus, which keeps them from drying up. While many amphibians, including frogs, salamanders and caecilians, have smooth skin, most toads have bumpy bodies covered with raised glands, some of which produce toxic secretions.

Why can reptiles live in saltwater?

Reptiles’ impermeable scales protect them from many pollutants and other toxins in water, on land and even in the air that an amphibian could absorb and be affected by. That’s also why reptiles can live in salt water and amphibians can’t.