Most plants are multicellular creatures. Green plants; They obtain most of their energy from sunlight through photosynthesis through their chloroplasts, which are thought to be formed as a result of endosymbiosis with cyanobacteria. Chloroplasts contain chlorophyll a and b, which give plants their green color. Some plants are parasitic or mycotropic and have lost the ability to produce normal amounts of chlorophyll or photosynthesize, but they still have flowers, fruits, and seeds. Although asexual reproduction is common in plants, sexual reproduction and change of generations are characteristic features.

There are around 320,000 plant species, and the majority of them (260,000 to 290,000) produce seeds. Green plants produce a significant portion of the Earth's molecular oxygen and form the basis of most ecosystems. Plants that produce grains, fruits and vegetables form the basis of the human diet and have been domesticated for thousands of years. of plants; It has many uses for decoration, as a building material, as a writing material and culturally. Additionally, plants are a very important source of medicines and psychoactive substances. Scientific studies on plants are the subject of botany, a sub-branch of biology.