What are the meanings of the following

Amphibians
Reptile
Mammals
Invertebrate
Vertebrate

Amphibians: Amphibians are a group of animals that can live both in water and on land. Their life cycle typically involves metamorphosis, starting from an aquatic larval stage (such as tadpoles) and developing into terrestrial adults (such as frogs or salamanders).

Reptiles: Reptiles are a group of cold-blooded animals characterized by scaly skin and laying shelled eggs. They breathe air and typically have four legs, although some reptiles, such as snakes, have evolved to be legless.

Mammals: Mammals are a group of animals characterized by having mammary glands that produce milk to nourish their young. They are warm-blooded, have fur or hair on their bodies, and most give birth to live young. Mammals include a wide range of animals such as humans, dogs, cats, cows, whales, and bats, among others.

Invertebrate: Invertebrates are animals that do not have a backbone or a spinal column. This group of animals includes a vast number of species, such as insects, spiders, snails, clams, jellyfish, and worms, among others.

Vertebrate: Vertebrates are animals that have a backbone or a spinal column. This group includes mammals, birds, reptiles, amphibians, and fishes.

Amphibians:

1. Amphibians are a group of cold-blooded vertebrates that live both on land and in water.
2. They typically have moist, permeable skin and undergo metamorphosis from a water-dwelling larval form to a terrestrial adult form.
3. Examples of amphibians include frogs, toads, salamanders, and newts.

Reptiles:
1. Reptiles are a group of cold-blooded vertebrates that are characterized by their scaly skin and laying eggs on land.
2. They have lungs for breathing and most species have a three-chambered heart.
3. Reptiles include lizards, snakes, turtles, crocodiles, and alligators.

Mammals:
1. Mammals are a group of warm-blooded vertebrates that have mammary glands, which produce milk for feeding their young.
2. They have hair or fur covering their bodies and most give birth to live young, although some lay eggs.
3. Mammals are capable of a wide range of behaviors and include animals such as humans, dogs, cats, elephants, and whales.

Invertebrate:
1. Invertebrates are animals that do not have a backbone or vertebral column.
2. This group encompasses a vast array of organisms, including insects, spiders, crustaceans, mollusks, worms, and more.
3. Invertebrates make up the majority of the animal kingdom and exhibit a wide range of body structures, reproductive strategies, and ecological roles.

Vertebrate:
1. Vertebrates are animals that possess a backbone or vertebral column.
2. They are characterized by bilateral symmetry, a closed circulatory system, and a well-developed nervous system.
3. Vertebrates include fish, amphibians, reptiles, birds, and mammals. They have a more complex internal structure compared to invertebrates.