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the two types of animals are the invertebrates and the vertebrates.

invertebrates are the animals without a backbone.

vertebrates are the animals with a backbone.

for more information on the vertebrates....read ahead...

these are the following features of a vertebrate:

1.presence of a tubular,dorsal,hollow nerve cord.

2.presence of a solid,rod-like structure called the notochord at some stage of life.

3.presence of a series of narrow,paired openings called gill slits.the gill slits disappear later on in most chordates.

4.presence of a postanal tail(tail behind the anal opening); the tail is reduced or absent in most chordates.

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βˆ™ 11y ago
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βˆ™ 12y ago

TWO CLASSICAL GROUPS ARE VERTEBRATES AND INVERTEBRATES .

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βˆ™ 12y ago

elephant

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Q: What are two big groups of animal?
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