During a long-distance run on a hot day, an athlete produces large quantities of sweat. as a result, the kidneys change the rate of urine production. why is this change important?

Factors that can increase mutation rates a. high temps b. low temps c. food additives d. uv rays

Identify the structure in organisms that do not have kidneys that is adapted to regulate water balance

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?