About Lesson
Development
- Development refers to the sum of all of the changes that an organism goes through in its life cycle, including growth and differentiation. Ultimately, development is an expression of the genetic program that directs the activities and interactions of individual cells.
- Leaf： leaf primordium →young →mature leaf
- Root： primordium →young→root system
- Fruit： fertilized egg→young→ripened fruit
Differentiation:
- The specialization of cells with the same set of genetic instructions to produce a diversity of cell types is called differentiation.
