Bacteria was missing from the first classification system
The answer to the question is the letter "A" Breakdown glucose.
The function of beta-galactosidase is to break down glucose. This beta-galactosidase is also commonly called "Beta-gal". This enzyme breaks down the glycosidic bond, it also includes carbohydrates that contain glucose.
Low levels of estrogen is a sign that the ovaries of a woman are beginning to fail. This is a common occurrence when one is at menopausal stage. Estrogen and progesterone naturally decrease and eventually stops the menstrual cycle. Hope this helped.