Water has a much higher specific heat than most other covalent compounds. what do you predict might happen if water had a low specific heat instead? a.) plants would not have enough water to effectively carry out photosynthesis. b.) organisms that are sensitive to changes in temperature would die. c.) plants would not have enough water to effectively carry out photosynthesis. d.) harmful organisms living in water would reproduce at a rapid rate. would be really great, you in advance!

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?