What is the first stage in a low/medium mass star's death? Choose one of the following. (neutron star, nova, protostar, red giant, red super giant, supernova, or white dwarf)

19. scientists use meteorites that hit earth to provide evidence of the composition of earth's interior because they hypothesize that

Which zone within the open-ocean zone is home to the most organisms? deep zone surface zone intertidal zone transition zone

Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the replacement of a gdp molecule with a gtp molecule, thus allowing a signal transduction pathway to be activated. considering the signal pathway illustrated on this page, what is one potential outcome of a mutation in the ras gene that leads to ras protein hyperactivity. be specific.