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Biology, 21.06.2019 22:00
What types of energy transfers and energy transportations are involved in the domino chain reaction?
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Biology, 22.06.2019 09:00
Several billion years ago which gas was the least prevailant in the atmosphere
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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?
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Help now will give brainlest 100 points Rebekah is studying lichens growing on a cooled lava field....
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