Answer:
Mitochondria are organelles in animal and plant cells responsible for cellular respiration, producing ATP. Chloroplasts, found in plant cells, are involved in photosynthesis, converting sunlight into chemical energy. While both have double membranes, mitochondria generate ATP through aerobic respiration, and chloroplasts utilize photosynthesis to produce sugars. Additionally, mitochondria contain their own DNA, resembling prokaryotes, while chloroplasts originated from endosymbiotic cyanobacteria.