1. Parasite is an organism that depends on a host for its nutrition and growth.
2. Host is the body that provides nutrition and growth to the particular parasite.
3. Cuscuta is a parasitic plant. It has no chlorophyll and cannot make its own food by photosynthesis. Instead, it grows on other plants, using their nutrients for its growth and weakening the host plant.
4. Algae are primitive plants that have chlorophyll generally in them for photosynthesis.