Question

multiple - choice question
what is the endosymbiotic theory?
the current best explanation of how simple cells such as eukaryotic cells evolved
. the current best explanation of how complex cells such as prokaryotic cells evolved
yes, this is how prokaryotic cells evolved into eukaryotic cells. the photosynthetic bacteria is now the chloroplast and the respiring bacteria is now the mitochondria of eukaryotic cells.

Explanation:

The endosymbiotic theory explains the evolution of complex cells (eukaryotes). Prokaryotic cells (simple) are not the focus. It details how prokaryotes (photosynthetic and respiring bacteria) became organelles (chloroplasts and mitochondria) in eukaryotic cells.

Answer:

Yes, this is how prokaryotic cells evolved into eukaryotic cells. The photosynthetic bacteria is now the chloroplast and the respiring bacteria is now the mitochondria of eukaryotic cells.