I believe the correct number of chromosomes is 92. Mitosis is the type of cell division that takes place in the somatic cells in which a parent cell divides into two diploid daughter cell with 46 chromosomes each. Cytokinesis is the process in which the cell divides into two cells after mitosis, therefore a cell that has not undergone cytokinesis will have 46 ××2 chromosomes.
There are plenty of plants producing oxygen by photosynthesis. Also, human's only use 5% of the oxygen in the air in respiration, there is 21% in the air.
