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Biology, 21.06.2019 22:20
Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?
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Biology, 22.06.2019 03:00
What best describes the structure of the declaration of independence?
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Biology, 22.06.2019 04:40
The negative impacts of nonnative species generally outweigh the positive impacts
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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
What other organic compounds could be used as an energy source if glucose is not available to our ce...
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