What is the basis for most ecosystems?

a. animals

b. water

c. the sun

d. the weather

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

Are salt and soap nutrients or toxins for yeast? explain.

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?