Cindy took two identical boxes, one painted black and the other painted white. she placed a scoop of ice cream in each of the two boxes. in which box will the ice cream melt last? black box, because black absorbs less heat than white black box, because black reflects more heat than white white box, because white absorbs less heat than black white box, because white refracts more heat than black

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?