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.
Do Children Need to go to Preschool? Whether or not a child needs to attend preschool is up to that child's parents. Educationally speaking, preschools cover the same general territory as kindergarten. This means that a child who does not attend preschool will be learning the same material as the child who does.