Biology, 15.12.2021 17:00 foriegnngal
The cells of all organisms contain DNA. In cells of which of the following groups is the cellular DNA enclosed in a nucleus?
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Biology, 21.06.2019 21:00
Which symbols below represent the ions found in the glass of water ? a. oh- and h+ b. co2 and o2 c. o2 and h2 d. nh3- and h+
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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 22:50
Below are the three main organs that make up the plant body
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Biology, 22.06.2019 23:00
All of these things can block a bronchus and cause collapse of a lung except
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The cells of all organisms contain DNA. In cells of which of the following groups is the cellular DN...
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