What does the bacterial cell, human cell and plant cell have in common?

All animals and plants are made of cells. Animal and plant cells have features in common, such as a nucleus, cytoplasm, cell membrane, mitochondria and ribosomes. Plant cells also have a cell wall, and often have chloroplasts and a permanent vacuole.

They also have DNA, Chromosome, ribsome. 

If the experiment was perfomed more then once and you get the same results