Question

give the full notes on vertebrates

Answer 1

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The vertebrates comprise a large group of chordates, and are subdivided into seven classes (3 classes of fish, amphibians, reptiles, birds, and mammals). Vertebrates have an internal skeleton of cartilage or bone, with vertebrae surrounding the dorsal nerve cord.

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Answer 2

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there are some vertebrates

1)mamals

Mamala evolved from reptiles about 200 millions years ago there are more than 4500 different species of mammals. Mamals live in all sorts of environments including the ocean, underground and land or water, all mammals are warm blooded, have fur on there body and produce milk to feed their babes

2)Reptiles

reptiles evolved from amphibians about 300millions years ago. Like amphibians they are cold blooded too. most reptiles lay eggs and there skin is covered with hard, dry scales

3)Amphibians

amphibians are animals that live part of their lives

in water and part of land. there are approximately 7000 amphibians. most amphibians hatch from eggs.

4)Fish

evovled from invertebrates about 540 million years ago. most of the varieties vary from vertebrates they are cold blooded animals live in water

5)birds

there are approximately 10,000 bird species in the world. They are only animals that have feathers and most of them fly lays egg like reptiles. warm blooded like mamals