Which of the following is a group of prokaryotes with cell walls that do not contain peptidoglycan, and which generally live in extreme, hostile environments?
archaebacteria
lichens
algae
autotrophs

Look at the images of different rocks. which rocks have a fine-grained texture? check all that apply. 1 2 3 4 5

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?

Other than earth, is also known to have magnetic pole reversal? a: venus b: mars c: earths moon d: the sun