Answer:
Eukaryotic cells arose through endosymbiotic events that gave rise to the energy-producing organelles within the eukaryotic cells such as mitochondria and chloroplasts. ... The endosymbiotic theory proposes that one organism engulfed another, and the two co-evolved together until they could not exist independently.
Explanation:
In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46.
Tapirs,anacondas,or caimans.<span />
