I think because so they can stay healthy for while
The answer is that Epithelial cells act as a passageway in which the air moves into the lungs. The epithelial cells in the respiratory system would serve as a leak proof barrier that do transports, filters as well as conditions the air one is breathing.
During vegetative propagation, a new plant grows from parts of the parent plant.
During mitosis, a cell divides to produce a new, genetically identical cell.
Explanation:
Both vegetative propagation and mitosis are methods of asexual reproduction followed by various organisms. In both the methods, only a single parent is involved in the reproduction of new daughter cells.
Vegetative reproduction is the asexual reproduction in plants with the formation of a new plant from the existing structures of the parent plant. These structures include rhizomes, bulbs, tubers etc.
Mitosis is a type of cell division which leads to the formation of genetically identical daughter cells similar to their parents. This occurs due to replication of the chromosome which then splits to form two identical daughter cells each with the complete set of chromosomes.
Not sure if you have any choices to give us, but I'm going to say:
Flexing or Flexion. :)