Small, but normal variations in genes may produce proteins that work differently from those of other individuals ( friends or relatives). This may affect how we respond to different medicines. The extent to which these proteins functions varies from one individual to another. Example; certain painkillers only work when body proteins convert them from an inactive form to an active one. If these proteins work too fast, the drug will be eliminated from the body before it has time to work. To do their job the pain killers need to bind and modulate a target body protein, the receptor, such that if the target body protein is altered the pain killer might not be able to bind.
The answer is biodiversity.
Dirty areas uninitialized dark wet moist
Answer: Plasma membrane is flexible because it regulate gases and water from inside and outside the cell and it have to perform endocytosis and exocytosisin in which large particle of food and water get inside the cell and come out from the cell.