The heart pumps oxygenated blood to the and deoxygenated blood to the
a) body: liver
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Biology, 22.06.2019 10:00
Which step is not included in the step approach to calculating the greatest common divisor?
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Biology, 22.06.2019 12:20
Which organ controls breathing? lungs alveoli heart diaphragm
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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?
Answers: 1
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