May 13, 2022, 16:45 IST
The term 'cell' was coined by Robert Hooke in 1665 in his book Micrographia after examining thin slices of cork under a self-designed primitive microscope.
Anton von Leeuwenhoek described free cells for the first time in 1674. Robert Brown in 1831 discovered nucleus, the most important component of every cell. By this time, it had also been known that the cells were surrounded by some sort of limiting membrane .
Schleiden (1838) and Schwann (1839) gave the 'cell theory’.
The cell theory is as follows
NCERT solutions for class 9 Science is prepared by Physics Wallah and consist of solution of all questions asked in NCERT Solutions . If any students need to take the online test to check their concepts or undertstanding then they can visit Quiz for Cell .
Download Free Pdf sheet of Short notes and key points of Biology for class 9 chapter-Cell from the link given below.