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.
In some states, it is not required for children to attend kindergarten. Mandatory age of enrollment varies by state but is usually age 5 or 6. In most states a child may begin kindergarten in the fall term only if age 5 by a state-set date, usually in the summer..