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Biology, 14.07.2019 23:30 naomicervero
Which sti us a common cause of cancer a. chlamydia b. syphilis c. human papilloma virus b. herpes
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Which of the following birds remained ancient looking in the miocene epoch? a. crows b. owls c. grouses d. none of the above
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Which scientific design has both practical limitations and limitations due to scale? studying the effect of bleach on the growth of mold spores exposing cultures of duckweed to different intensities of light observing the replication of dna molecules with a hand lens using colored marbles to model a cross between two colors of rabbits
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Biology, 22.06.2019 13:00, mimivenga
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 sti us a common cause of cancer a. chlamydia b. syphilis c. human papilloma virus b. herpes...
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