Answered In the diagram below, letter A represent the starting volume of liquid in a graduated cylinder. letter B represents the volume after 8 milliliters of liquid was removed.
This information indicates that the scale on this graduated cylinder is in milliliter increments of :
(1) 1 (3) 8
(2) 2 (4) 4

In many humans, exposing the skin to sunlight over prolonged periods of time results in the production of more pigment by the skin cells (tanning). this change in skin color provides evidence that -

If a grape were placed in a hypertonic solution what would happen and why?

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?