subject
Biology, 29.01.2021 16:40 oliviaschmitt0

Determine the variables tested in each of the following experiments. If applicable, determine and identify any positive or negative controls. Submit this exercise to your instructor upon completion. 1. A study is being done to test the effects of habitat space on the size of fish populations. Different sized aquariums are set up with six goldfish in each one. Over a period of six months, the fish are fed the same type and amount of food. The aquariums are equally maintained and cleaned throughout the experiment. The temperature of the water is kept constant. At the end of the experiment the number of surviving fish are surveyed.
A. Independent Variable: Different sized aquariums
B. Dependent Variable: number of fish that survived
C. Controls: Negative controls are the food, maintenance, water temperature.
2. To determine if the type of agar affects bacterial growth, a scientist cultures E. coli on four different types of agar. Five petri dishes are set up to collect results:
One with nutrient agar and E. coli
One with mannitol-salt agar and E. coli
One with MacConkey agar and E. coli
One with LB agar and E. coli
One with nutrient agar but NO E. coli
A. Independent Variable: Four different types of agar
B. Dependent Variable: Bacterial growth
C. Controls: Negative control is the petri dish with nutrient agar but no E. coli.

ansver
Answers: 2

Another question on Biology

question
Biology, 22.06.2019 05:30
The carbon cycle is best defined as a process in which a. carbon changes from inorganic forms to organic forms and back b. carbon is changed into other elements such as oxygen or nitrogen c. carbon is continually created from the sun’s energy by plants d. carbon is consumed and regenerated from other elements such as oxygen and nitrogen
Answers: 1
question
Biology, 22.06.2019 05:30
The vaccine in a flu shot contains weakened flu viruses. how does a flu shot work with the immune system? a. it destroys lymphocytes. b. it destroys macrophages. c. it activates macrophages. d. it activates lymphocytes.
Answers: 3
question
Biology, 22.06.2019 07:30
The ancestors of plants that lived in water had plenty of water for the young. angiosperms are a group of land plants that evolved a reproductive trait for living on land. this trait protect young plants by allowing them to grow only when water is present and the conditions for healthy development are right. what trait most likely young angiosperms in this way?
Answers: 1
question
Biology, 22.06.2019 13:20
Aragonite shells of clams, snails, or scleractinian corals may be preserved unaltered in cenozoic deposits, but they are generally dissolved or recrystallized in older deposits. true or false
Answers: 1
You know the right answer?
Determine the variables tested in each of the following experiments. If applicable, determine and id...
Questions
question
Mathematics, 22.02.2021 21:50
question
Biology, 22.02.2021 21:50
question
Mathematics, 22.02.2021 21:50
question
Mathematics, 22.02.2021 21:50
question
Mathematics, 22.02.2021 21:50
question
Arts, 22.02.2021 21:50
Questions on the website: 13722362