Question

which structure will form when a primitive cell engulfs an aerobic bacterium?
○ cell membrane
○ nucleus
○ chloroplast
○ mitochondria

Explanation:

According to the endosymbiotic theory, when a primitive cell engulfs an aerobic bacterium, mitochondria are formed. Mitochondria are thought to have originated from endosymbiotic aerobic bacteria. Chloroplasts come from endosymbiotic photosynthetic bacteria, the cell - membrane and nucleus are not formed by this endosymbiotic event with aerobic bacteria.

Answer:

mitochondria