During which age range do most girls' bodies begin to undergo changes such as breast development and hair growth under the arms?

Girls body begin to undergo changes because of puberty, probably from the ages 8-14.

lysosomes contain a variety of enzymes, enabling the cell to break down various biomolecules it engulfs, including peptides, nucleic acids, carbohydrates, and lipids (lysosomal lipase). the enzymes responsible for this hydrolysis require an acidic environment for optimal activity. hope i !