What is meant by overproduction by a population

this means that there are too many people living in an area and are getting produced and so it creates a lift in the number of people or species living in that area creating an vast increase in a population.

Explanation:

this is because many people  are reproducing causing a population increase.

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.