Now build a model of liquid water. Place your materials on a sheet of paper. The regular-size marshmallows can represent the larger oxygen atoms, and the mini marshmallows can represent the
smaller hydrogen atoms. Connect the marshmallows with toothpicks using the picture as a guide. Create
a total of four molecules. What was difficult about building the model?

8) warming your hands by a fire is an example if which heat transfer? a. conduction b. convection c. radiation d. none of these

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.

What relationship exists between an enzyme and a catalyst?