Eukaryotic cells arose through endosymbiotic events that gave rise to the energy-producing organelles within the eukaryotic cells such as mitochondria and chloroplasts. ... The endosymbiotic theory proposes that one organism engulfed another, and the two co-evolved together until they could not exist independently.
Cleanliness in the hands are a big one. cough into your elbow not youur hand bc you touch things with your hands. keep things clean! these are a few ways to stop the spread of disease
