Scientists believe that ancient bacteria represents the first evidence of life on earth. which of these best describes the process by which bacteria was created?

decomposition of fungi
reactions in ancient plants
transformation of virus like molecules
reproduction in single celled organisms

You are attempting to recrystallize a crude product mixture. you add the appropriate amount of hot solvent and are allowing the solution to slowly cool to room temperature. however, at room temperature no crystals have appeared, which of the following methods should be used to induce crystallization? choose all correct answers. a) place the flask in an ice bath. b) swirl the contents of the flask. c) add a small seed crystal of the desired product. d) scratch the inside of the glassware using a stir rod. it can be multiple choices