1. Growth: Growth is the process of permanent increase in size and weight of an organism. The change in shape, volume and number of cells occur during growth.
Example: baby grows into an adult, seed grows into a plant.
2. Development: During growth, the body undergoes an increase in the complexity of body structure. This is called development. During development, the cells undergo differentiation and take up particular functions.
3. Adolescence: Adolescence is the age between puberty and full maturity in humans. It signifies the age during which reproductive organs become functionally active and a young person develops from a child into an adult. It begins at an age of about 11 years and ends at about 18 years.
4. Puberty: Puberty is an age in humans when the reproductive organs become functionally active. Between the age of 11 and 14, the tests start to make sperms and the ovaries start to make eggs. This time of development in life is called puberty.
5. Metamorphosis: Metamorphosis is the process in which a series of changes occur to transform a larva (as in insects) or tadpole (as in frog) into an adult.
