Silicon is a chemical element with the symbol Si and atomic number 14. It is a hard, brittle crystalline solid with a blue-grey metallic lustre. It is a tetravalent metalloid and a semiconductor. It is the second most abundant element in the Earth'scrust, making up 27.7% of it by weight.
From Molecules to Organisms: Structures and Processes
Gather and synthesize information to explain how prokaryotic and eukaryotic cells differ in structure and function, including the methods of asexual and sexual reproduction.