The number of species in a given community can be increased by:

Which description provides the best objective summary of the article in the passage?

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.

The main ingredient of magma is a pahoehoe. b silca c dissolved gases d obsidian