Question

which definition describes endosymbiosis best? a symbiotic relationship in which one organism lives on the other organism and both organisms benefit a symbiotic relationship in which one organism lives inside the other and both organisms benefit a symbiotic relationship in which one organism benefits, while the other organism is harmed

Explanation:

Endosymbiosis is a symbiotic relationship where one organism lives inside another, and both benefit. For example, mitochondria and chloroplasts are thought to have originated this way. The first option describes a general symbiotic relationship where one organism lives on the other (not inside), and the third option describes parasitism.

Answer:

a symbiotic relationship in which one organism lives inside the other and both organisms benefit