Question

why did the host cell possibly allow mitochondria and chloroplasts to stay inside? they were beneficial to the host cell they had larger dna they were initially misidentified

Explanation:

The endosymbiotic theory explains that mitochondria (from aerobic bacteria) and chloroplasts (from photosynthetic bacteria) were engulfed by host cells. For the host to retain them, the organelles must have provided benefits: mitochondria produce ATP (energy), chloroplasts do photosynthesis (make food). Larger DNA or misidentification don’t explain retention—benefit (mutualism) drives it.

Answer:

A. they were beneficial to the host cell