During meselson and stahl’s experiment, e. coli was grown on heavy nitrogen for what purpose?
a. so each generation of dna would have a different weight to distinguish them by.
b. so each generation of protein would have a different weight to distinguish them by.
c. to determine how the bacteria functioned with a heavier element.
d. to see how the heavy nitrogen affected their dna.

Abiology teacher asks students to give examples of genetic variations that support the idea that changes in a population’s environment affect genetic variation. which is the least supportive example? a. changes in genetics in human populationsb. antibiotic resistance in bacteria populationsc. pesticide resistance in garden insectsd. changes in the color of the peppered moth population in england