what is cell theory ?
Answers
All plants and animals are living beings. All of these organism look different from each other, however all of them are made up of microscopic unit called cells.
An English scientist Robert hooke had discovered the cell in 1665. He observed slices of cork under his self - designed crude microscope. Cork is the park of a tree. He took thin slices of a cork, then he observed the cork under the microscope. He noticed a number of compartments in the cork slice resembling the structure of honey comb. He coined the term cell for each box. In the latin language it is also called as 'little room'. Robert hooke had actually seen the dead walls of the plant cells. These cells do not have their living content and they looked like little rooms. However, even 150 years after Hook's discovery very little was known about the cell until improved microscope with high magnification were made.
Two German biologists Matthias Jakab Schleiden and Theodor Schwann had proposed the cell theory of life. This theory was further refined by the great scientist Robert Virchow in 1855.
1 All living organism are made up of cell.
2 Cells are basic structural, functional unit
3 Every organism starts life as single cell.
4 No cell can originate spontaneously.
In biology, cell theory is the historic scientific theory, now universally accepted, that living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells.