Ncert Exercises & Solutions

5. What is the difference between direct and indirect development?

Direct development	Indirect development
1. It is a type of development in which an embryo develops into a mature individual without involving a larval stage.	1. It is a type of development that involves a sexually-immature larval stage, having different food requirements than adults.
2. Metamorphosis is absent.	2. Metamorphosis involving the development of larva to a sexually mature adult is present.
3. It occurs in fishes, reptiles, birds, and mammals.	3. It occurs in most of the invertebrates and amphibians.