Why are antibiotics not for treating the common cold?

Texas bluebonnet plants seen in this photo are an example of which ecological unit?

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.

Chloroplasts and bacteria are in size. a. similar b. at different ends of the size range c. exactly the same d. none of these