Question

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

carbon
carbon
silicon
silicon
fructose
fructose
hydrogen

Answer 1

Clams and oysters extract **carbon** from the water to build their shells. Specifically, they use carbonate ions (CO3^2-) derived from dissolved carbon dioxide (CO2) in the water to form calcium carbonate (CaCO3), which is the main component of their shells.