The world is stable and unchanging
The process in a woman of discharging blood and other materials from the lining of the uterus at intervals of about one lunar month from puberty until menopause, except during pregnancy.
Answer:
A
Explanation:
Disulfide bridges in proteins are made of covalent bonds between two sulfurs adjacent to each other in a protein. Therefore Cysteines who's side groups have sulfurs are significant determining the position and number of S=S bonds in a protein. Because covalent bonds are the strongest bonds, they stabilize a protein making it is hard to denature. The more the S=S bonds the higher the stability of the protein. An example of proteins with S=S bonds is keratin, the protein that makes nails and curly hair.
Selective breeding is breeding between two animals of similar characteristics. cross breeding occurs when two animals from the same species create a new breed. such as when a husky and wolf have a puppy. they are the same species but different breeds.
