The oxpecker, a small African bird, periodically cleans ticks and other pests off the skin of the impala (like a deer). The impala, in turn, protects the oxpecker from large predatory birds and provides it with a constant supply of food. This relationship is an example of

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 !