Question

according to the endosymbiotic theory, which cellular process was involved in the evolution of mitochondria and chloroplasts? photosynthesis endosymbiosis phagocytosis symbiosis

Explanation:

The endosymbiotic theory posits that mitochondria and chloroplasts were once free - living prokaryotes that were engulfed by a larger cell through phagocytosis. Over time, a symbiotic relationship developed. Endosymbiosis is the long - term relationship that resulted, not the initial engulfing process. Photosynthesis is a metabolic process, not related to the origin of mitochondria and chloroplasts in this context.

Answer:

phagocytosis