The eye is a complex sensory organ that allows us to see the world around us. The eye works by gathering light from the environment and converting it into electrical signals that can be interpreted by the brain. The basic structure of the eye includes the cornea, iris, pupil, lens, retina, and optic nerve. The cornea is the transparent outer layer of the eye that helps to focus incoming light. The iris is the colored part of the eye that regulates the amount of light that enters the eye through the pupil, which is the black circular opening in the center of the iris. The lens is a clear, flexible structure located behind the iris that helps to focus light onto the retina. The retina is a thin layer of tissue that lines the back of the eye and contains photoreceptor cells called rods and cones. These cells convert light into electrical signals that are sent to the brain via the optic nerve. The rods are responsible for the low light vision and detecting motion, while the cones are resp
In previous decades there are many scientists came who gave different - different classification of organisms. Some of them are discussed here. (1) Aristotle : Aristotle was the father of biology and father of zoology. He was the Greek political philosophers. He classified plants on the basis of morphological character (growth habit) in three groups : Trees Shrubs Herbs (2) Theophrastus (371 - 287 B.C.) : He is known as father of ancient plant taxonomy and father of botany. He was also the Greek political philosophers. Theophrastus wrote book on plants named Historia plantarum . He also proposed the term Annual, Biennial and Perennial. He gave the artificial classification of plants. He classified plant kingdom in to four groups on the basis of growth habit : Trees Shrubs Under shrubs Herbs (3) Carolus Linnaeus (1707 - 1778) : His real name was Carl Von Linne . On the basis of work in Latin language, he changed his name to Carolus Linnaeus. He w