Answer:
Mitosis is a type of cell division in which a single parent cell is divided into two daughter cells. Before mitosis, replication of chromosome occurs in which two copies are formed from a single set of chromosome. These two copies of chromosome are distributed among the daughter cells.
Cytokinesis is the phase of cell division in which cytoplasm of the cell is divided into two equal parts and distributed to each daughter cell.
The risk of lung cancer death is no different between medium, low, and very low-tar cigarettes.
People who smoke low-tar cigarettes compensate the lack of tar by changing their breathing habits, for example, they will take deeper drags or hold the smoke in for a longer period of time, basically negating the supposed " low-tar" effect.