Chromatography is a method of separating the components of a mixture over time. Chromatography has allowed for the discovery of many specialized pigments<span>, including at least five </span>forms<span> of chlorophyll. </span>
They can either be protons (positive) or electrons (negative)
Google: <span>The female reproductive system has two functions: The first is to produce egg cells, and the second is to protect and nourish the offspring until birth. The male reproductive system has one function, and it is to produce and deposit sperm.</span>
