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Q.

The term ‘protobionts’ is used for describing the

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a

First formed bacteria

b

First formed protozoans

c

First formed viruses

d

First formed cells

answer is D.

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Detailed Solution

Concept: An aggregate of abiotically produced organic molecules surrounded by a non-unit membrane is called protobiont. 

They were transformed into the first living prokaryotic organism with gradual improvement in metabolism, growth, and reproduction.  Therefore, the term ‘protobionts’ is used for describing the first formed cells.

Hence, the correct answer is option D.

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