Question

What are the princpal biological systems of the earth ?​

Answer 1

hello friend this is your answer

The principal biological systems of the earth are four in number-fisheries, forests, grasslands and croplands or agricultural lands-which are the fundamental components of the global economic system

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Answer 2

The fur principal biological systems on the earth are as follows:

1.Fisheries

2.Forests

3.Grasslands

4.Croplands