Dr. Simmons wants to make sure her scientific investigation is considered good. She knows that for an experiment to produce valid results, it must adhere to accepted methods. Which procedure would she not include as part of her valid scientific experiment? A. precise observations
B. organized procedures
C. uncontrolled variables
D. controlled surroundings

What is avogadro’s number, and why is it useful

What is the mass of 2.00 l of an intravenous glucose solution with a density of 1.15 g/ml?

Consider a culture medium on which only gram-positive organisms such as staphylococcus aureus colonies can grow due to an elevated nacl level. a yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the ph as a result and changing the color of a ph indicator chemical. this type of medium would be referred to as a differential and enrichment culture.