Biology, 12.08.2020 09:01 sandyrose3012
18. Pepsin is an enzyme produced by stomach cells
to help digest protein. Stomach cells package
and secrete pepsin in which of the organelles
Answers: 3
Biology, 21.06.2019 18:30
The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.
Answers: 2
Biology, 22.06.2019 09:00
Were you able to observe the nucleolus in any of the cells if so which ones
Answers: 3
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
Biology, 22.06.2019 21:30
Through wich tissue do sugar get transported to reach the leaves during growth and reproduction
Answers: 2
18. Pepsin is an enzyme produced by stomach cells
to help digest protein. Stomach cells package
Mathematics, 26.12.2020 05:20
English, 26.12.2020 05:20
English, 26.12.2020 05:20
Health, 26.12.2020 05:30
History, 26.12.2020 05:30
English, 26.12.2020 05:30
Mathematics, 26.12.2020 05:40