The endosymbiotic theory proposes that mitochondria in eukaryotic cells arose from . a. endosymbiotic eukaryotes that metabolized oxygen. b. endosymbiotic eukaryotes that were photosynthetic. c. endosymbiotic prokaryotes that metabolized oxygen. d. endosymbiotic prokaryotes that were photosynthetic .

The endosymbiotic theory explains that mitochondria and chloroplasts descended from the same type of bacteria. Symbiosis is an interaction between two organisms of different species, and endosymbiosis is a type of symbiosis in which one organism lives inside the other one. According to the endosymbiotic theory, a host cell ingested symbiotic bacteria, which specialised into mitochondria. That bacteria was able to metabolize oxygen. Inside the cell, after mitochondria evolved as organelle from ingested bacteria, it kept its function to metabolize oxygen.

answer; i do believe that the correct answer is; ///mendelian genes are at specific loci on the chromosome and, in turn, segregate during meiosis;

if your own plato the answer is b. the fern transitioned from sporophyte generation to gametophyte generation.