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 release acids that help break down the rock to form soil.
C. They replace smaller trees and shrubs that can't get enough sunlight.
D. They add nutrients to the rock and have roots that hold the rock together.

Which law represents a balanced chemical equation?

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

What is the significance of the protein-lined pits? a. protein attracts other proteins needed for atp synthesis within the cell. b. protein-lined pits are able to transport one molecule at a time down the concentration gradient within the cell. c. the polarity of proteins allows other polar molecules to attach and be transported in the cell by transport channels. d. receptors within the pits allow ligands to fuse and be transported into the cell by endocytosis.