4. After enriching for a benzoate degrader in Lab 1, a student streaked out the liquid culture onto a plate of media in which benzoate was the only available source of carbon. After incubation, the student assumed that an isolated colony on the benzoate agar represents a pure culture, but their lab partner said that wasn’t necessarily true. Explain why the lab partner is correct.

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.

gasoline is a mixture. it contains several different kinds of compounds that can be present in a variety of ratios.