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1. There are two characteristics that all living beings have in common: they are made of cells and they do three vital functions. ... -
1. Ecosystems are made up of three elements: the biotope, the biocenosis and the relationships between them. 2. The biotope is ... -
THE PRIMARY SECTOR IN SPAIN 1. The primary sector is where resources are taken from nature. 2. The primary sector in Spain...
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