Which one of the following choices is not one of the main processes that allow nutrients to be absorbed from the gi tract into circulation?
a. passive diffusion
b. active diffusion
c. facilitated diffusion
d. active transport

Competition occurs between species when

The galapagos island contain 13 species of finches four of the species are seen here it is believed that all of the species had one common ancestor and overtime

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.