A scientist is studying endosymbiosis in cells.This means she is investigating
A)how mitochondria and chloroplasts were derived from eukaryotic cells.
B)how mitochondria and chloroplasts were derived from prokaryotic cells.
C)how mitochondria and chloroplasts evolved into eukaryotic cells.
D)how mitochondria and chloroplasts evolved into prokaryotic cells.
E)how mitochondria but not chloroplasts evolved into prokaryotic cells.

Question

Quizplus · Accepted Answer

Endosymbiosis refers to the theory that proposes that mitochondria and chloroplasts were once free-living prokaryotic cells that were engulfed by a larger host cell, then developed a symbiotic relationship with the host cell over time. Therefore, the scientist studying endosymbiosis in cells is investigating how mitochondria and chloroplasts were derived from prokaryotic cells (option B).

A Scientist Is Studying Endosymbiosis in Cells