Answer:
37oC - temperature
It is important that the temperature is controlled because it maintains consistency and safety.
Explanation:
-Temperature is a common type of controlled variable.
-A control variable is anything that is held constant or limited in a research study
Answer:
The independent variable is amounts of distilled water.
Explanation:
The dependent variable of this experiment is the height of each plant which is dependent on the amounts of distilled water added to each pot. Notice that days and amount of soil are constants. Therefore, the independent variable in this case is the amount of water added to each pot.
By mating with desired traits is your answer
A,B,C,D I'm pretty sure, but check with others who answer the question too.
