CELL, DISCOVERY OF CELL, CELL THEORY (Class-09)

By Er. Anoop Dhiman8 Comments

CELL: All the organisms are made up of very small a very small unit called cell.

DISCOVERY OF CELL

In 1665, Robert Hooke  first discovered a cell when he was observing a bark of tree as a cork under a primitive microscope(self designed microscope).

He observed it is made up of small spaces contained wall which resembled with honeycomb structure. These small spaces were termed as  Cell.

Short Notes : The Fundamental unit of life - School

SOME IMPORTANT DISCOVERY

(a) In 1665, Robert Hooke  first discovered a cell when he was observing  thin slice of cork a cork under a primitive microscope.

(a)After 1674, Leeuwenhoek discovered a living cell in pond water.

(c)In 1831, Robert Brown discovered nucleus of the cell.

CELL THEORY

Cell theory was given by botanist Schleiden andzoologist Schwann. It state that

  • All living organisms are composed of cells.
  • Cell is the fundamental unit of life.
  • All new cells come from pre-existing cells.

Answers the following Questions in comment box

  1. Who discovered the cell and when?
  2. Who discovered the nucleus and when?
  3. Who gave the statement that all the cell arise from pre-existing cells?