4 Which of the following facts about mitochondria and chloroplasts supports the theory of endosymbiosis, leading to the evolution of eukaryotic cells?
-They are similar in size to eukaryotic cells.
-They can replicate themselves within the cell.
-They contain double-stranded DNA.
-They contain their own RNA.

what's the rest of the question

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.