1.Proteins are macromolecules in which the monomer units are amino acids. Name the bond that joins these monomers.

Macromolecules are made up of single units known as monomers that are joined by covalent bonds to form larger polymers.

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation: