Question

the organelle is found in cells of _________ and is theorized to have once been an independent organism.

Answer 1

the mitochondria and cholorplasts are the 2 organelles found in eukaryotic cells that are supposed to have been independent long ago :)

Answer 2

Photosynthetic autotrophs are organisms that make their own food from sunlight through the work of pigments in chloroplasts. It is thought that chloroplasts in these organisms were once self-sufficient cells.