Learn the benefits and risks of options and how to start trading options Lucas Downey is the co-founder of MoneyFlows, and an Investopedia Academy instructor. Samantha (Sam) Silberstein, CFP®, CSLP®, ...

Metabolism refers to the chemical reactions that occur within an organism to sustain life. The reactions are divided into two categories: catabolism (the breakdown of organic matter to produce energy) ...