Which best describes a predator animal? a. one that is defensive b. one that burrows into soil c. one that shows mimicry d. one that eats other animals

Based on the topographic map of mt. st. helens, what is the contour interval of the volcano about height is 2,950 m?

Aprocedure done under controlled conditions to test a hypothesis is an inquiry.

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?