Question 31 1 pts
Which of the following is NOT considered to be a value of wetlands?
providing a source of potable water
filtering water by trapping pollutants, sediments, and pathogenic bacteria
providing habitats for migratory birds and other wildlife
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As a small change in a person's dna can cause a genetic disorder

Acquired mutations can result from radiation pollution toxins inheritence select all that apply

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?