How did endosymbiosis happen?
2 Answers
Mitochondria and Chloroplast were swollen.
Explanation:
Mitochondria and Chloroplast were the cells itself before endosymbiosis. As an proof of that mitochondrial DNA was suggested. They were swollen by host cell and with the passing of time symbiotic relation became strong. Host provides security,mitochondria and chloroplast give energy to cell.
Eukaryotic cells engulfed prokaryotic cells.
Explanation:
The endosymbiotic theory is how scientists think mitochondria and chloroplasts evolved in eukaryotic organisms. Before mitochondria and chloroplasts were organelles in a cell, they were prokaryotes that were absorbed by eukaryotic cells.
The mitochondrion was originally a prokaryotic cell that could undergo aerobic respiration. After being absorbed by a eukaryotic cell, it developed a symbiotic relationship with its host cell.
The chloroplast was originally a prokaryotic cell that could undergo photosynthesis (eg. cyanobacteria). Like the mitochondria, the photosynthesizing bacteria became dependent on the host cell after being engulfed.
