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.
Clueless. First of all, Preschool usually means a preschool for 3 and 4 year olds that starts a new class every fall. These preschools do not accept children who are younger than 3 (or about to turn 3.) The idea is that children attend a preschool for one or two years just prior to starting kindergarten.