One pound of body fat is equivalent to approximately calories

"griffith's experiment discovering the "transforming principle" in pneumococcus bacteria. griffith's experiment, reported in 1928 by frederick griffith, was the first experiment suggesting that bacteria are capable of transferring genetic information through a process known as transformation." - griffith's experiment.

as resources become scarce because of population growth, the growth decreases after few years due to lack of resources and food.