Synthetic estrogen-like compounds have been found in the marine environment. the synthetic compounds "mimic" the biological activity of the important vertebrate sex hormone estrogen. how is this pollutant best classified and why? what caused this to be a public health concern?

What are the doorways into and out of cells, attached to the membrane, and built in the rough er.

Which set of terms best describes a community of miners who live out in the countryside of west virginia and use specialized geological equipment to analyze the composition of rock?

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.