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First life on earth was : -
A
Cyanobacteria
B
Chemoheterotrophs
C
Autotrophs
D
Photoautotrophs
Detailed Solution
According to the Oparin–Haldane theory, the first living forms arose in the primitive ocean, which was rich in organic molecules formed by chemical evolution.
These first organisms could not make their own food. They obtained energy by breaking down the organic molecules already present, anaerobically. So they were chemoheterotrophs.
Autotrophs (including photoautotrophic cyanobacteria) evolved later, when the organic food in the sea became scarce.
So the first life on earth was chemoheterotrophs.
These first organisms could not make their own food. They obtained energy by breaking down the organic molecules already present, anaerobically. So they were chemoheterotrophs.
Autotrophs (including photoautotrophic cyanobacteria) evolved later, when the organic food in the sea became scarce.
So the first life on earth was chemoheterotrophs.