How are hydrogen bonds different from covalent bonds ? covalent bonds are organic; hydrogen bonds are inorganic the compounds that result from hydrogen bonds contain carbon; those that result from covalent bonds do not hydrogen bonds are weaker than covalent bonds and form between partially charged atoms or molecules the atoms in hydrogen bonds have valence electrons ; the atoms in covalent bonds have valence spaces

Which of the following is required of a new drug?me

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?

Does anyone know what the schooling version of sos mean? example