For a science day demonstration, Ms. Morella's class built a model showing how Earth's various spheres interact with one another. Which
process could the class use to show interactions among the
hydrosphere, the atmosphere, and the biosphere?
o erosion of soild by flowing water
O photosynthesis in a large rain forest
formation of icebergs as glaciers reach the sea
o breaking down of rocks by mechanical weathering of tree roots
Question 10
3 pts
W. z

Which is not a likely outcome after extensive irrigation of dry farmland? useless, unproductive soil salinization of the soil depletion of groundwater nutrient-rich soil

Which of these is not a nucleotide base found in dna?

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?