What is an animal that has a backbone includes mammals birds reptiles amphibians and fish?

Answer 1

Mammals are animals that have fur/hair, they live on land, they give live birth, and they feed milk to their youth.

Amphibians are animals that live in water then land.

Fish are animals that have scales on their skin, they have gills and fins, lay eggs in water, and live in water all their life.

Reptiles are animals that live on land, they have scales on their skin, and they have camouflage.

Answer 2

reptiles are turtles,snake,lizard,or crocodile.amphibians are animals that live on land and water.mammals are animals that have fur in one point of there lives and they have babies not eggs.they are also cold-blooded.birds are animals that have feathers or wings.fish are animals that are always in the water.

Answer 3

Ok let's start with birds. Birds have feathers and light-weight hollow bones in a criss-cross structure. Reptiles have dry scaly skin and most lay eggs. Amphibians live double lives in land and water, lay eggs, and most have a smooth moist skin. Mammals have hair and mammary glands. Fish have fins, gills, scales, and lay eggs.

Answer 4

Mammals are warm-blooded animals that give birth to live young (with the exception of the platypus). They also feed their young with the mother's milk, and often have hair or fur on their bodies.

Reptiles are cold-blooded animals (most do not produce their own body heat) that lay eggs instead of giving live birth (there are a few snakes that push this boundary). Reptiles usually have scales instead of hair or fur.

Amphibians are also cold-blooded animals that lay eggs, but differ from reptiles because they spend much of their lives in water. For example, a land-faring toad begins life as a tadpole in water. Amphibians can also breathe through their skin, to a certain extent. Certain amphibians also have gills like fish do.

Answer 5

Amphibians lay their eggs in water, have an aquatic larval stage involving gills, and have semi-permeable skins that act as secondary respiratory surfaces.

Reptiles are amniotes, meaning they lay eggs with a hard shell containing the yolk and the white, or amniotic structures. They can be oviparous, meaning they lay their eggs and they hatch outside the mother's body, or viviparous, meaning they gestate their young within the mother's body. They do not have an aquatic larval stage.

Mammals have fur and feed their young with milk produced by their bodies. They are endothermic, meaning they can control their own body temperatures. They are amniotes as well, and bear their young alive.

Answer 6

There are more fish in the world. There are more than 25 thousand species of fish in the world so far (they keep finding more species of fish).

Answer 7

Frogs are amphibians

Answer 8

vertibrate

Answer 9

There are more fish in the world.