Hemoglobin is a protein that carries oxygen through the blood. In sickle cell anemia, this protein has a sickle cell shape due to a change in a single amino acid. This is an example of the structure altering the protein's function.

not too sure but maybe in the hot springs.

radon is correct hope this

the statements that apply here about binary star system are

"have stars that might appear to wobble"

"often have one star that is brighter than other"

a binary star is a star system consisting of two stars revolving around their common barycenter. systems of two or more stars are called multiple star systems.