Difference Between Convergent and Divergent Evolution. When considering living organisms, evolution can be defined as the development of differentiated organisms from less differentiated pre-existing organisms over the course of time. There are many sources, which provide evidence to the theory of evolution.
You're apparently differentiating between daycare and preschool, right? Private preschools (about $500 per month for three days per week, 9:00a to 1:00p) typically have a minimum age of 30 months (2.5 years) and potty-trained.
age 7 by first day of school age 6 on or before september 1 eff 2014 2015 age 7 age 6 by september 15 children enrolled in preschool programs 4 years old on or before september 15 are considered to be of compulsory school attendance age