Scientists estimate that there are as many as 9 million species of life on earth. More than 6 million of these are yet to be discovered. There are million of different types of living things on earth. To understand how they relate to each other, scientists arrange them into groups. This is called classification. Some groups are easy to identify , for example, all mammals feed their young ones milk, but other are more complicated.
List:
1. Microlife
2. Fungi
3. Plants
4. Invertebrates
5. Vertebrates
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