In humans as in many other organisms, some types of cells reach maturity and never divide again, and types other cells continue to divide for the lifespan of the individual. Find an example one type of human cell that stops dividing once it reaches maturity and one type of human cell that continues to divide for the life of the organism. Explain why it is adaptive to divide or not divide in each case [use normal cells, not diseases].

Which of the following initial observations would more directly lead to this research study? a) ginko biloba is cost effective and also possesses heart-protective, antioxidant, anti-inflammatory properties. b) metformin is an effective treatment of patients with t2d, but shows side effects that complicate the disease state. c) over the past several years, the cost of treating t2d within the united states has increased dramatically. d) many plants contain molecules that improve the health and quality of life of patients with a variety of diseases like t2d. e) t2d affects millions of individuals in the usa and worldwide many of who could benefit from improved therapies.