Identify a dependent variable in the experimental design. identify a negative control for the effects of hormone addition. identify a likely reason why the researchers continued their experiment for 240 minutes

There are independent variables inside a given experiment or the mechanisms in which the different nature or states of factors exists. While, the different factors inside the human too can be highlighted as the variables with the negative and positive effects inside a given experiment. While, the variables like the hormones can be negatively controlled by the human body, as there are certain variables like the hormones which can only be observed in a more normal level.

As, there are certain experimentation carried out in knowing the cure for the different bacterial and viral infections. The different antigens are there inside the human body and most of them require more time to test there severeness and controlling the infectious agents effect inside the living organisms. There are different microorganisms which provides the severe conditions for any living organisms and they require to be controlled by the different professionals. And for the research workers to work on the specific case each of professionals wants the hormones to carry out the whole process by a more negative control over the different factors, as the factors are given more space for them to execute there process more naturally or in a more natural process,so, it requires about 240 min to calculate or analyze the different steps of the mechanisms.

Where is the map? explain the choices?