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Lena [83]
3 years ago
13

The earliest organisms were completely heterotrophic in nature. Why?

Biology
1 answer:
bearhunter [10]3 years ago
5 0
The correct answer to this question is this one: they lacked oxygen. The earliest organisms were completely heterotrophic in nature because of the reason that they lacked oxygen. <span>A heterotroph is an organism that cannot fix carbon and uses organic carbon for growth. </span>
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