Which statement is correct regarding the semiconservative nature of DNA? Best answer will be marked brainliest A. Nitrogenous bases in each “parent” strand serve as a template for the new strand to be made

B. The semiconservative nature of DNA allows DNA to stay the same during gamete (egg and sperm) production

C. RNA operates as a template to allow DNA to replicate itself using ribosomes

D. The structure of the sugars on the DNA molecule direct the correct nucleotides into place during replication

Astudy by solloch and et. al., in 2017, gives the map above which shows the frequency of alleles with a ccr5-delta32 mutations over 87 different countries. this mutation deletes the presence of a co-receptor (ccr5) on the outside of human t-cells (lymphocytes). some viruses, such as the one responsible for the black death and human immunodeficiency virus (hiv), require this receptor for attachment to host cells during the infection process. the black death was an epidemic that passed over northern europe during the 14th century killing nearly 60% of europeans. according to this information, which explanation best explains why northern europeans show a greater immunity for hiv than some other parts of the world?