a student observes one palisade cell which is at the length of 0.80, while he is using a magnification of 400x. Calculate the length of the cell in um

Which medullary index indicates a human hair? a. 0.653 b. 0.733 c. 0.516 d. 0.256

Aboy jumps into a cold swimming pool and his body tempature goes down hus muscles ,blood vessels

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?