Severe combined immunodeficiency (scid): a. is a result of the absence of macrophages or b cells b. affects only part of the adaptive immune response. c. can be caused by failure of tap transporters. d. can be caused by failure of vdj recombination. e. all of the above.
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Biology, 22.06.2019 06:30, chrischris1
How have high taxes on tobacco products impacted the number of people who use them? a. the number of tobacco users has increased. b. the number of tobacco users has decreased. c. the number of tobacco users has not changed. d. the number of adolescent tobacco users decreased, while the number of adult users increased
Answers: 2
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?
Answers: 1
Biology, 22.06.2019 17:00, katiedurden02
Earthquakes a. created the rock in arches utah b. can be caused by volcanic eruptions c. are caused by tsunami waves d. wear mountains down into hills
Answers: 1
Severe combined immunodeficiency (scid): a. is a result of the absence of macrophages or b cells b....
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