. First life form on earth was a

A: Cyanobacterium

B: Chemoheterotroph

C: Autotroph

D: Photoautotroph



Best Answer


According to many researches  it is said that chemoheterotrophs were the first to have life on this planet 

As the name suggests they are dependent on the chemicals for energy and they feed others.

Sea is considered as their source of origin 

They do have chlorophyll so they can not prepare their  own food.

Final Answer

Hence, the correct option is (B) 'Chemoheterotrophs'.


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