The first one with the boxing crab and anemone is mutualism.
The second one with the dog and flea is parasitism.
By looking at the diagram, and my knowledge of Punnett squares, i would say B. 4:16
In order to study the formation of cancer cells, you should study the life cycle of normal cells as cancer cells are abnormal cells.
Actually, Normal cells grow, divides and died after an interval of time. And when this process is break down, cancer cells begin to form. They are usually old cells which don't die after their life cycle.
Hope this helps!
