All live species are made up of cells, which are basic structures in a body. In 1665, a scientist named Robert Hooke discovered them while examining a cork slice under a rudimentary microscope. Later, in 1674, Leeuwenhoek used an improvised microscope to see living organisms in pond water. In addition to the major discovery, other scientists later found the other components of the cells. Thus, in 1831, Robert Brown found the nucleus, and in 1839, a scientist named Purkinje discovered protoplasm, coining the term to describe the fluid substance inside the cell.
Later, in 1838 and 1839, two biologists named Schleiden and Schwann proposed the cell hypothesis, which argues that all animals and plants are made up of cells, which are the fundamental units of life. In the year 1855, another scientist named Virchow added to the cell hypothesis by suggesting that all cells originate from pre-existing cells. The introduction of the scanning electron in 1940 allowed scientists to examine and understand the cell's intricate structure and organelles.
In this article, we will learn about the following topics in NCERT class 9th science chapter 5:
● History of the cell
● Components of the cell
● Cell structural organisation
● Cell wall
● Plant cell and animal cell
● Types of cells
● Cell organelles
● The fundamental unit of life class 9 NCERT solutions
To begin with, let us know some basics of the chapter and NCERT class 9 science chapter 5 solution:
Refer to the NCERT solutions class 9 science chapter 5 for more understanding.
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