Explanation
The first person to observe a living cell was Anton van Leeuwenhoek. He was a Dutch scientist and is often referred to as the "father of microbiology". Using a simple microscope that he designed and built himself, he observed and described single-celled organisms, including bacteria and protists, which he called "animalcules". He made these observations in the 17th century, long before the development of modern microscopy techniques.
Robert Hooke, an English scientist, was the first to observe and describe plant cells in 1665. Robert Brown, another English botanist, is credited with the discovery of the cell nucleus in 1831. Dutrochet, a French biologist, discovered osmosis, the movement of water across a semipermeable membrane, in plant cells in 1826.
