Environmental science question! question 4 (multiple choice) which of the following describes the depletion of a renewable resource? a. the hunting of excess deer to maintain a healthy population size b. mining coal in areas where it is plentiful c. intensive cultivation of farmland that exhausts nutrients d. increased use of solar energy to generate electrical power

What best explains the inability for life to exist in earth early atmosphere

In the ocean why are the greatest amount of primary producers found in the epipelagic zone and how does that affect biodiversity

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?