<span>The spicules have an important purpose for loosely constructed animal such as sponge. First of all, spicules give structure which is vital due to loose construction. Secondly, it protects from predators. This is similar to porcupine quills in serving to protect.</span>
No, it will not make white. Mixing light is different from mixing pigments. Paint is a pigment not light.
(Hope this helps!)
Ice age. It caused saber tooth and mammoth to die
