Lysosomes help in intracellular scavenging. It's enzymes can digest all types of macromolecules. If a cell is dead in our body then the lysosomes inside the cell will burst and cell will be digested. Thus during prolonged absence of food , it digests cell of body to provide energy. It also helps in metamorphosis in tadpole larva. A lysosomal enzyme cathepsin , help in digestion of tail during metamorphosis.