A stimulus is any event or situation that triggers a response from an organism. In terms of economics, a stimulus can refer to government interventions or policies designed to boost economic activity or support particular sectors.
External, meaning outside. Thus, Outside(External) Skeleton.
more external, most external
the reproduction of frogs are external fertilization. By Crystal
Is a salmon internal or external?
external fertilization is external
internal external not internal external not
A crab has an external hard shell, and is an invertebrate.
The external carotid artery.
external
its internal
No, worms are not external.