Question

Choose the correct order of changes from the primitive earth to formation of first cells.

• A. Combination of atoms to form molecules $\to$ Protobionts $\to$ Hot dilute soup $\to$ Coacervates $\to$ First cells
• B. Combination of atoms to form molecules $\to$ Hot dilute soup $\to$ Protobionts $\to$ Coacervates $\to$ First cells
• C. Hot dilute soup $\to$ Combination of atoms to form molecules $\to$ Coacervates $\to$ Protobionts $\to$ First cells
• D. Combination of atoms to form molecules $\to$ Hot dilute soup $\to$ Coacervates $\to$ Protobionts $\to$ First cells

Answer 1

The correct option is D Combination of atoms to form molecules $\to$ Hot dilute soup $\to$ Coacervates $\to$ Protobionts $\to$ First cells

Life on primitive earth was not the same as it is now. Earth's temperature was very high and atoms could not combine to form molecules. But as earth started cooling down, atoms combined to form molecules with $H_2$, $N_2$, ${NH}_3$, ${CH}_4$, ${CO}_2$ and water vapour was formed. These inorganic compounds combined to form simple organic compounds which further formed complex compounds. These compounds accumulated in sea water, making the sea a hot dilute soup. Molecules aggregated in this soup to form coacervates. Once nucleic acid took control as the genetic material of coacervates, coacervates finally established to form protobionts. With time, protobionts led to the formation of the first cells.