Briefly explain the reason that Sedlak gives for water shortages.

Which direction does the energy flow in this energy pyramid ?

What is usually (but not always) related to the metabolic processes of living organisms in its organic form?

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.