A green alga with throat - and stomach - like structures can swallow and digest bacteria when deprived of light, further bolstering Lynn Margulis's widely accepted
idea that the origin of the plant - powering chloroplast was a fortuitous bout of indigestion.Termed «Endosymbiotic Theory», the
idea is that early
nucleated cells called eukaryotes ate bacteria that managed to escape digestion but also couldn't escape their captors.