Plants are the autotrophs as they have the ability to synthesize their own food by the process of photosynthesis due to the presence of green pigments.During this process, they utilize carbon dioxide and water in the presence of sunlight. However, some plants are partially heterotrophic and are called as insectivores. They have various means of capturing insects so as to supplement their diet with nitrogen derived from insects, as they live in nitrogen-deficient soil. Examples include the pitcher plant (Nepenthes), Venus flytrap, bladderwort, and sundew plant (Drosera).