Which theory has supportive evidence that an ancient bacteria cell engulfed photosynthetic bacteria and heterotrophic bacteria and successfully lived together and over time evolved into a eukaryotic cell containing chloroplast and/or mitochondria?

The endosymbiotic theory deals with the origins of mitochondria and chloroplasts, two eukaryotic organelles that have bacteria characteristics. Mitochondria and chloroplasts are believed to have developed from symbiotic bacteria, specifically alpha-proteobacteria and cyanobacteria, respectively.

Explanation:

Haploid cause in our body, we have 46 chromosomes so 23 pairs. Two haploid reproduction cells contains 23 chromosomes each. Humans have 46 chromosomes, so when the ovaries and the testicules cells make the ovules and spermatozoids, they are diploid at the beginning, but when they finish duplicating, haploid cells are born, having each 23 chromosomes. When a ovule and a spermatozoid will be united, an embryo will be created and have 46 chromosomes