Practice question

Question

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : The early eukaryotic cells engulfed aerobic bacteria (endosymbiosis) and made it part of the cell body, which eventually became the present-day mitochondria. Reason R : Such engulfment of aerobic bacterium was just a coincidence without any specific evolutionary objective. In the light of the above statements, choose the most appropriate answer from the options given below