Which is an observation that supports the theory of endosymbiosis?
A) Chloroplasts carry out photosynthesis.
B) Chloroplasts divide independently of the nucleus.
C) Mitochondria are present in large numbers in some cells.
D) Mitochondria are found in both plant and animal cells.
E) Plastids are organelles found only in plant cells.

Question

Quizplus · Accepted Answer

Chloroplasts and mitochondria have their own DNA and divide independently of the cell nucleus, supporting the idea that they were once independent prokaryotic organisms that became symbiotic within a host cell.

Which Is an Observation That Supports the Theory of Endosymbiosis