Like the unicellular organisms that came before them, multicellular organisms developed when conditions were ideal for their development. The rise of multicellular organisms allowed for Earth to develop, or evolve, a wide range of life forms.
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common management practices in dairy and poultry farming are: (i) proper shelter facilities and their regular cleaning. (ii) some basic hygienic conditions such as clean water, nutritious food, etc. (iii) animals are kept in spacious, airy, and ventilated place.