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.
This article is about schools for younger children between the ages of three and five or seven, prior to the start of compulsory education. For other, see Preschool (disambiguation). Preschooler redirects here. For The stage of childhood, which ranges from 3 to 5 years old, see Early childhood.