Biology, 03.08.2019 12:40 michelerin9486
Depending upon its composition, each type of coal burns differently. the "older" the coal, the harder the coal, and the greater percentage of present.
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Biology, 22.06.2019 00:10
The production of cells during mitosis into specialized function is recombination or differentiation
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Biology, 22.06.2019 05:30
What environmental cues and landmarks do the geese use to determine the timing and direction of their migration over the mountains? how do they find their way?
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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?
Answers: 1
Depending upon its composition, each type of coal burns differently. the "older" the coal, the harde...
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