It is difficult to determine a definition for life that is suitable for all situations. instead of defining life, biologists have decided to
a. describe the characteristics of life
b. determine if something is living or non-living based on its complexity
c. qualify life based on whether something can move or not
d. determine something is living if it responds to outside stimuli

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds

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: