Which branch of science includes the study of black holes

Which of the following is an oxidation-reduction reaction? (pictured below)

The process by which natural forces move weathered rock and soil brim one place to another is called

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.