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Biology, 16.07.2019 21:00 korirosekc
The population growth curve is when a population encounters environmental resistance.
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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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Which characteristics must an object possess in order to be considered alive?
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The moon has a bigger influence on our oceans than the sun because the moon is closer to the earth than the sun the sun is only made of gas and the moon is solid the magnetic attraction of the moon makes gravity stronger the water on the moon attracts the water on the earth
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The population growth curve is when a population encounters environmental resistance....
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