It has been theorized that the organelles of eukaryotic cells evolved from prokaryotes living symbiotically within a larger cell. explain three lines of evidence that support this theory.

Three lines of evidence that support the endosymbiotic theory:

1. The presence of membrane - Organelles like mitochondria and plastids have their own cell membranes, just like a prokaryotic cell does,

2. The presence of DNA - Each of these organelles have its own DNA genome, like a bacteria's genome, but much smaller.

3. Reproduction (division) - Multiplication of the organelles occurs just like in bacteria, by division.