Tobacco contains hundreds of compounds most of which are harmful. One of the main studied effects off tobacco smoking on arteries is that, once it is inhaled and enters the blood through the lungs, it disrupts the function of the lining <span>of the arteries which is called the 'endothelium'.
False because if she rarly exercises than she would not be burning the extra calories she gained and there fore would be gaining an unhealthy amount of weight.
Every cell in your body has the same genes/DNA but, the gene expression process decides which genes are active in which cells which is how each cell type gets it properties.
