Unit 0 Mastery Check 4

Dr. Haeusser, a famous cheese microbiologist, is studying the effects of bacteriophage on the development of cheese rind. He takes various different species of phage, adds them to communities consisting of 10 microbes that are forming a biofilm on cheese, and then makes observations on the texture and flavor of the cheese.

What is the independent variable?

• number of microbes

• the biofilm

• flavor of cheese

• texture of cheese

• types of bacteriophage

Dr. Haeusser, a famous cheese microbiologist, is studying the effects of bacteriophage on the development of cheese rind. He takes various different species of phage, adds them to communities consisting of 10 microbes that are forming a biofilm on cheese, and then makes observations on the texture and flavor of the cheese.

What is the dependent variable?

• types of phage

• flavor of cheese

• texture of cheese

• flavor of cheese and texture of cheese

• types of phage and types of microbes

Dr. Haeusser, a famous cheese microbiologist, is studying the effects of bacteriophage on the development of cheese rind. He takes various different species of phage, adds them to communities consisting of 10 microbes that are forming a biofilm on cheese, and then makes observations on the texture and flavor of the cheese.

Which of the following would BEST work as a negative control?

• adding all of the phage

• not adding any phage at all

• using only 1 type of microbe

• measuring only the flavor

If error bars overlap that means

• the data is statistically significantly different

• the data is not statistically significantly different

• there is a high degree of uncertainty in your data

• you can have high confidence in your data

A hypothesis... [pick all that apply]

• must be testable

• must be falsifiable

• is proven when your experiment works

• must end up being true

• if correct, will aid in the formation of a law, but not a theory