Just as biologists classify living things, astronomers classify galaxies. what feature is used to classify galaxies?

As a small change in a person's dna can cause a genetic disorder

1. describe the structure and function of the specialized cells you observed in the video. 2. research the types of cells present in the kidney.

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.