The electrons of an atom
Select one:
a. have a positive charge.
b. are attracted to the...
Biology, 11.11.2020 21:20 Brandon4188
The electrons of an atom
Select one:
a. have a positive charge.
b. are attracted to the positive charge of neutrons.
c. orbit the nucleus in various energy levels.
d. are found in the nucleus along with the protons.
Answers: 3
Biology, 22.06.2019 01:00
Why reason best illustrates why hershey and chase chose to use viruses in their experiment?
Answers: 2
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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