Question

multiple choice question
an endosymbiosis between two organisms means that ______.

one organism lives inside the other

they are closely related phyogenetically

the two organisms live in a shared compartment

their internal and external environments are the same

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Explanation:

Endosymbiosis is defined as a symbiotic relationship where one organism resides within the body (or cells) of another organism. The other options are incorrect: phylogenetic relatedness is not required for endosymbiosis, a shared compartment is not the defining feature, and the internal/external environments of the two organisms remain distinct.

Answer:

one organism lives inside the other