I think its b or c im 80.99% sure
Answer:
Sexual reproduction increases the genetic variation within the population, because new individuals are made by randomly combining genetic material from two parents. Because only fit individuals reach sexual maturity and reproduce, the overall population tends toward increasing fitness in its environment.
Explanation:
Answer:
purine
Explanation:
Purines are nitrogenous base that have two carbon-nitrogen rings. The most naturally occurring purines are adenine and guanine which are found in DNA and RNA as nucleotide building blocks of these polymers. Purines are constituents other important biomolecules, such as ATP, GTP, cyclic AMP, NADH, and coenzyme A. Purine and pyrimidine ribonucleotides built up essential intermediates in the synthesis of the polynucleotides RNA and DNA.