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

rocks and weathering-matching

americans began to notice growing differences between the northern and southern sections of the country. there were more people living in cities in the north, which made it more urban. more people lived on farms in the south, which made it more rural. while many people were farmers in the northern states, there were now other ways to make a living, such as working in mechanical cotton gins factories manufacturing cloth, tools and other goods. people in the north supported high tariffs on goods imported from europe because the extra cost encouraged people to “buy american” instead. in the southern states, planters did not like tariffs because they sold most of their production to europe and bought their tools from there as well. southerners believed the protective tariff was something that only northern factory owners keep their profits high. so the southern politicians came up with an idea. they would opt out. they would simply ignore the protective tariff. it was ‘null and void’ in south carolina. the state would not collect the taxes on goods imported into south carolina, no matter what the president said they had to do. this decision led to the nullification crisis.