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Biology, 22.06.2019 06:30
Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots
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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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Biology, 22.06.2019 17:00
Internal feedback works to maintain homeostasis when your a. heart rate decreases as your white blood cells increase b. breathing rate decreases as your red blood cells decrease c. heart rate increases as your liver is cleaning blood d. breathing rate increases as your heart rate increases
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Biology, 22.06.2019 21:00
In the controversial scientific process of cloning, organisms are created that are genetically identical to there parent. this process would be classified as
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The graph shows the world human population size and growth rate over time. How are the two sets of d...
Mathematics, 04.03.2020 01:29
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