Organelles such as mitochondria and chloroplasts are hypothesized to have originated by , by which larger cells engulfed smaller cells.

Endosymbiosis

Explanation:

Organelles such as mitochondria and chloroplasts are hypothesized to have originated by Endosymbiosis , by which larger cells engulfed smaller cells.

The endosymbiosis theory is a biological theory of evolution which states that eukaryotic cells were formed from prokaryotic organisms.

answer; i believe the correct answer to the above question is ( friction)

x would be the most and the least would be y because there are more fruit   and seeds than flock z has insects