Groundwater supplies can be easily contaminated by surface mining of coal. ALL BUT ONE may be how surface mining might adversely affect
groundwater conditions,
A) direct dumping of tailings and effluents into rivers
B) water used in the chemical extraction of metals, commonly contains process chemicals
water which has trickled through solid mine wastes may contain dissolved minerals, process chemicals, and/or metals
D) technologies used to control water flow prevents contamination
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Biology, 22.06.2019 03:30
Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils
Answers: 1
Biology, 22.06.2019 11:30
Plz quick a natural resource that is replaceable through a cycle in nature or sustainable practice is called a? the subject is science
Answers: 1
Biology, 22.06.2019 13:00
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?
Answers: 1
Groundwater supplies can be easily contaminated by surface mining of coal. ALL BUT ONE may be how su...
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