Biology, 05.07.2019 10:30 ghadeeraljelawy
Asection of the periodic table is shown below: periodic table showing three rows. row 1: boron (b), carbon (c), nitrogen (n), oxygen (p), fluorine (f), neon (ne). row 2: aluminum (al), silicon (si), phosphorus (p), sulfur (s), chlorine (cl), argon (ar). row 3: gallium (ga), germanium (ge), arsenic (as), selenium (se), bromine (br), krypton (kr). which of the following elements has properties similar to kr? br ga ne se
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Biology, 22.06.2019 05:30
Most crimes involve some evidence relating to the human body; for that reason, what related science is frequently used in forensic investigations? a)psychiatry b)physics c)botany d)biology
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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?
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Biology, 22.06.2019 16:40
Which of these definitions have been paired with the correct type of cell?
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Asection of the periodic table is shown below: periodic table showing three rows. row 1: boron (b)...
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