Modern classification systerns place organisms into one of three domains called, Select one:
a. Animalia, Plantae, Eubacteria.
b. Animalia, Plantae, Protista,
c. Archaea, Animalia, Plantae.
d. Archaea, Eukarya, Eubacteria,

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?

Jason adds the antibiotic penicillin to a bacterial culture. the bacteria develop genetic modifications in their genome, which gives them resistance to the antibiotic penicillin. what caused this genetic modification?

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.