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 Requirement. A student must be age 5 to enter kindergarten or age 6 to enter grade one. Compulsory school age is 6. However, if a child enters kindergarten at age 5, he or she is considered to be of compulsory school age. No district shall admit to the first grade a child who has not successfully completed kindergarten.