Explain why natural selection could not occur if organisims didn't have to compete for rescources they need to survive and reproduce

because the light is a great source of energy for the plants to survive. (i hope this )

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: