Coccolithophores and Foraminiferans Both Use ________ to Form Their Exoskeletons

Question

Coccolithophores and foraminiferans both use ________ to form their exoskeletons.
A) Si⁴⁺
B) Fe³⁺
C) Ca²⁺
D) HPO₄⁻

Accepted Answer

Coccolithophores and foraminiferans both use calcium ions (Ca²⁺) to form their exoskeletons.