Biology, 14.02.2020 21:38 bendlogan2687
Most viruses...
A) are rarely found in the natural world
B) switch between pathogenic and non-pathogenic modes of existence
C) can use host machinery to produce more of themselves
D) are persistent and innocuous within host cells
E) kill the cell they infect
Answers: 1
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
Biology, 22.06.2019 13:30
Where is most of the fresh water on earth found a in the ocean b in glaciers and in ice caps c in rivers d in the soil
Answers: 1
Biology, 22.06.2019 14:00
Homo heidelbergensis was a tall, muscular hunter, who used both tools and weapons. because h. heidelbergensis was not a gatherer/forager, but ate a varied diet including meat and fish, we would expect to see what anatomical changes?
Answers: 1
Biology, 22.06.2019 17:30
Which of these reproductive method is the only on available to mosses and fernsspores
Answers: 1
Most viruses...
A) are rarely found in the natural world
B) switch between pathogenic an...
A) are rarely found in the natural world
B) switch between pathogenic an...
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