Which of the following types of cells do not reproduce, and if damaged by injury or disease, are lost forever? answers: skin cells. red blood cells. muscle cells. brain cells.

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?

Where substance is produced during cellular respiration

Which nucleotide component contains nitrogen