Answer:
The earth's macromolecules inside the moitochndria which supported the successful evolution of protobionts.
Step-by-step explanation:
Protobionts -
The evolutionary precursors of the prokaryotic cells are the protobionts . carbohydrates , proteins , lipids and other organic compound have the most important auto catalytic organic compounds .Water is required for the assembly of the protobionts endoplasm .
Mitochondria is the heterotropic protobionts that can obtain energy from organic molecules .It is possible that the earliest mitochondria could be used as protobionts food .
The Chloroplast and the mitochondria was developed as soon as the self sufficient protobionts could obtain energy directly from the environment .