Answers: 3
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 14:30, briana21092005
Fill in the blank with the best word to complete the sentence. white blood cells protect against and aid in blood clotting when injuries are sustained.
Answers: 2
Biology, 22.06.2019 15:30, gunnatvinson
Some plants have reproductive structures that them reproduce using natural forces or animals. how does the reproductive structure shown here ensure the reproductive success of plants?
Answers: 1
How does water move through Gorongosa?...
Mathematics, 05.06.2020 22:05
Mathematics, 05.06.2020 22:05
Mathematics, 05.06.2020 22:05