Parasitism is an example
a) predation
b) commensalism
c) symbiosis

of those who start drinking before they're 15 will develop alcohol dependence

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 !

true, i don't really know what you're asking but from the info you provided im guessing the answer is true.