Cytochrome C is a protein that functions in cellular respiration as part of the electron transport chain. It is frequently used to determine evolutionary relationships between different organisms because it is highly conserved (only differs slightly) between different organisms. A student researching evolutionary relationships between different organisms performed an ELISA test to analyze differences between cytochrome C proteins in different organisms. What is the independent variable in this experiment?a) the organismb) the darkness of color resulting from the ELISA testc) the antibody used in the ELISA testd) the protein being compared (cytochrome C)

A) the organism

Explanation:

In an experiment, the independent variable is the variable that the experimenter changes or manipulates in the experiment in order to bring about a measurable response.

In this question involving the a student researching evolutionary relationships between different organisms who performed an ELISA test to analyze differences between cytochrome C proteins in different organisms. The DIFFERENT ORGANISMS used by the student is the independent variable because it is what the student changes in order to check out the difference in their cytochrome C proteins

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