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 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. |