Question

What do animals such as clams and oysters extract from the water to build their shells?(1 point)
Responses

silicon
silicon

carbon
carbon

hydrogen
hydrogen

fructose

Answer 1

Clams and oysters extract **calcium** and **carbonate** from the water to build their shells. However, from the options provided, none of the choices are correct, as calcium and carbonate are not listed. If you were looking for the main materials involved, they use calcium ions (Ca²⁺) and carbonate ions (CO₃²⁻) to form calcium carbonate (CaCO₃), which makes up their shells.