How do lichens prepare bare rock to support the growth of plants? A: They use nitrogen from the air to make nutrients that plants can use.

B: They add nutrients to the rock and have roots that hold the rock together.

C: They replace smaller trees and shrubs that can’t get enough sunlight.

D: They release acids that help break down the rock to form soil

a- all cells come from pre-existing cells

i won't lie i don't know so go online and ask google thats what i do

sorry to break it to ya but no one can answer your question it's just

jk but i am serious about the part that most people cant answer it beacuse you did not mention the section you are talking about. but it would if you added some detail and were a bit more specific.