Worth 26 points! Help me please! Do 1,2,3 by filling in the blank And I will make you brainest! And don’t answer just to get points or I am reporting you

and no website

To maintain asepsis when administering an injection, all parts of the syringe can be handled except the:

What is true of sea slugs in these orders

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?