Odyssey quiz
?
tools
how fast would a 2-kilogram object need to move to have the same kinetic
energy as a 4-kilogram object moving at 8 meters per second?

Which of the following is an oxidation-reduction reaction? (pictured below)

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?

Modern sea star larvae resemble some primitive vertebrate larvae. this similarity may suggest that primitive vertebrates