The third level of cell organization is the .
Tissue level
System level
Organism lev...
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Biology, 22.06.2019 01:00
The bacteria found in soil is usually harmful and measures are taken to remove any traces of microorganisms. true or false
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Biology, 22.06.2019 06:00
Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell
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Biology, 22.06.2019 11:00
Need the diagram below, which is not drawn to scale, shows the position of the earth, moon, and sun. what type of eclipse occurs when the earth, moon, and sun are lined up in the order shown? a. planetary eclipse b. solar eclipse c. martian eclipse d. lunar eclipse
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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
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