Question

Identify a dependent variable measured in the researcher’s experiment. Identify one control that the researcher could use to improve the validity of the experiment. Justify the researcher analyzing blood samples at many intermediate time points instead of at only the beginning and the end of the 20-week period. BoldItalicUnderline

Answer 1

Answer:

(a).concentrated lactic acid and that of NAD+.

(b).use of the response of NAD+ and lactic acid in absence of vitamin treatment as the CONTROL.

Explanation:

To understand this question and be able to solve this question efficiently we have to understand the concept of "respiration''. But, the short and the most simple answer to the question above can be found in the first statement of the question.

The electron transport chain include the cycle that occurs during glycolysis, fermentation and the transformation of NAD+ to form NADH and vice versa.

In the research, the dependent variable is the concentrated lactic acid and that of NAD+.

In order to increase the validity of the experiment, the Researcher can make use of the response of NAD+ and lactic acid in absence of vitamin treatment as the CONTROL.