Multiple choice: 1.) How does a lack of access to clean water affect communities?

increase in drought conditions
increase in sanitation
decrease in water privatization
decrease in educational achievement

2.) Which statement is true about the water treatment process?

It generates solid waste that is disposed of back into the water supply.
It removes biological, chemical, and physical contaminants.
It removes contaminants from groundwater only.
It causes sediment to accumulate in surface water.

15 points come and ! which characteristic describes all bacteria? a rod-shaped b microscopic c multicellular d autotrophic

The image below shows a weather service map. which details best describe this map? check all that apply

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?