Evidence from other studies suggests that exclusion of fire results in markedly decreased plant-species richness, often with an increase in tree density.
Not every species ages, and some research suggests that drugs or changes in diet may slow metabolism or alter basic aging processes so that we can live longer.
The decrease of the number of germ cells were accompanied by the reduction of DNA content and accorded to the degree of PCNA expression in several group.
For one thing, they were accompanied by big increases in production costs—everything from the cost of steel in oil rigs through to higher wages for mining engineers.
He says while research suggested these ill effects could be reversed within two years if the child lived in a smoke-free house, for many the ramifications of parental smoking were life-long.