In the list below, write the letter C next to substances that are compounds. Write the letter M next to substances that are mixtures. a. Tap water
b. Air
c. A rock
d. Oxygen in air
e. A skin cell
f. A mineral supplement
g. The smell of mint
h. Carbon dioxide
i. Clay mineral
j. Gasoline

answer; ///(b) it is composed of four protein chains and four heme groups;

it would be heredity

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation: