1. You are interested in the microbial count in some yogurt you bought from the grocery store. However, the only dilution vessels you have available are 500 milliliter buckets. You weight 5 g and add it to 95 ml of saline, making 100 ml of yogurt slurry. 5 ml of this mixture is then added to 95 ml of saline. This is repeated again one more time. Finally, 1 ml of this sample is added to 30 mL of nutrient agar and poured into a petri dish. You count 231 colonies. Determine the total cell count in CFU/g of the original yogurt.

Drag each tile to the correct box. the body monitors the levels of oxygen in the blood to regulate breathing. isabel is running in a marathon and is near the finish line. she feels out of breath. how will her nervous system work to generate a reaction? arrange the tiles in chronological order. isabel's breathing rate increases. sensory receptors in the arteries detect low oxygen levels. the brain sends signals through motor neurons. sensory neurons generate an impulse. the central nervous system relays an impulse to certain brain regions.