Question

question 41 (multiple choice worth 3 points) (02 03a mc) which of these observations gives the most support to the endosymbiotic theory for the origin of eukaryotic cells? the size disparity between most prokaryotic cells and most eukaryotic cells the observation that some eukaryotic cells lack mitochondria the similarity in size between the cytosolic ribosomes of prokaryotes and the ribosomes within mitochondria and chloroplasts the existence of structural and molecular differences between the plasma membranes of prokaryotes and the internal membranes of mitochondria and chloroplasts

Explanation:

The endosymbiotic theory proposes that mitochondria and chloroplasts were once independent prokaryotes that were engulfed by a larger cell. The similarity in size and structure of prokaryotic ribosomes and the ribosomes within mitochondria and chloroplasts supports the idea that these organelles were once free - living prokaryotes. Other options either contradict or do not support the endosymbiotic theory.

Answer:

The similarity in size between the cytosolic ribosomes of prokaryotes and the ribosomes within mitochondria and chloroplasts