Aspecies of gray wolf was eliminated from a national park because of unrestricted hunting. as a result, there was a tremendous increase in the population of its prey, the elk. the populations of other herbivores also increased. what imbalance might this situation have on the ecosystem?
there will be a steep increase in the number of producers in the national park.
b.
the increase in the prey population will result in overgrazing, causing a decline in woody plant species.
c.
the population of other predator animals will decrease.
d.
the ecosystem will remain largely unaffected.

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?