The highest amount of a nutrient that can be consumed without likely harm in a group of individuals of a similar age is the

a) dietary reference intakes(dri).
b) tolerable upper intake level(ul).
c) recommended dietary allowance (rda),
d) adequate intake(ai),

B

Explanation:

Tolerable Upper Intake Level is the nutrient individuals in a group of the same age can take daily in an unquantifiable amount because it has no inimical effect

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:

its temperature is increasing. this causes molecular vibrations to increase.