I think but I do not know it refered to as being repetitive
The animals that cannot adapt to their changing enviroment will not be able to survive and reproduce.
I'm pretty sure they are reffering to Alzheimers.
Enzymes are biological molecules that significantly speed up the rate of virtually all of the chemical reactions that take place within cells. The vital for life and serve a wide range of important functions in the body, such as aiding in digestion and metabolism.
