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What three questions could you ask someone to determine whether they live in a rain shadow?

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Biology, 22.06.2019 05:20

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Biology, 22.06.2019 06:30

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Biology, 22.06.2019 12:30

What goes in and out of a cell respiration?

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Biology, 22.06.2019 13:00

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?