The<em> cell membrane</em> controls the movement of substances in and out of cells and organelles. In this way, it is selectively permeable to ions and organic molecules.
People living nearby steep cliffs can impact them in
different ways, the people nearby will affect them into having a decrease area
available to grow crops as it is dangerous to even grow crops in areas like it,
another thing is, there will be an increase of landslide hazard as they are in
a steep cliff. Having steep cliffs are dangerous and will only cause them a
disadvantage.
What I know is that amino acid has side chain, amine groupe ,and groupe of carboxyl so what make them difference is side group where the is 20 different R-group which give each individual characteristics
