Refer to the experimental set-up above. What is the purpose of the overturned bucket (note it is solid, not clear) in part A?

The kidneys, ureter, bladder, and urethra the body maintain homeostasis through the process of a. excretion b. specialization c. respiration d. digestion

Disinfection of impression materials is usually accomplished by a. sterilization with high heat. b. spray or immersion in a chemical disinfectant. c. sterilization with steam under pressure. d. allowing the impression to sit 24 hours in water until all the organisms die.

Check all that apply diatoms are marine algae that have a shell made of silica, what are some of the uses of the silica shell after the diatoms die? 1.the shells make up the diatomaceous earth used in filters 2.it can be used as an ingredient in abrasives 3.they are used in food products 4.the shells can be used in some insulating materials