Classify butter, cheese, log, orange, newspaper, plastic bottle, wool, electric bulb, salt, cooking oil and butter as living ,non living and dead .support your answers with reasons

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:

geologic time scale (for gradpoint) =)