All organisms are composed of cells. the size and shape of a cell determines how well it can deliver nutrients to its interior. since all cells and organisms depend upon the efficient delivery of gases, nutrients, and other important molecules, the relationship between a cell's surface area and its volume is an important regulating concept
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Biology, 21.06.2019 15:30
Which of these is the most likely consequence of falling petroleum price
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Biology, 22.06.2019 04:30
Why is it incorrect to say that mitochondria function only as energy factories with cell
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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 13:00
This is a biological reaction due to a stimulus. i need this quickly !
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All organisms are composed of cells. the size and shape of a cell determines how well it can deliver...
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