Of the major classes of biological molecules, which one is responsible for the transmission of traits from one generation to the next?

Nucleic acids

Explanation:

Nucleic acids are the polymers of nucleotides and are of two main types: DNA and RNA.  

DNA (deoxyribonucleic acid) serves as a genetic material in most of the organisms. DNA is packed with help of packing proteins and is organized into long thread-like structures known as chromosomes. DNA is carried from one generation to next via chromosomes.  

For example, each of the male and female parents in humans contributes 23 chromosomes to the progeny and thereby transmitting the DNA present in their sex cells to the progeny.  

it's anything that aren't producers and consumers.

explanation:

you've got to be clear on what "this" is

i don't know. if i were you, i would search it up online : d