CELL : THE UNIT OF LIF
By:-Raushan Kuma
, CELL : THE UNIT OF LIFE
What is Cell ?
• Cell is the structural and functional unit of an
organism.
Unicellular organism
• All organisms are composed of cells.
• Some are composed of a single cell and are
called unicellular organisms.
• While others composed of many cells, are
called multicellular organisms.
Multicellular organis
, CELL : THE UNIT OF LIFE
Minimum Requirement in a Cell
Cell Membrane
Cytoplasm Complete cell
(show independent existence
Genetic material
Unicellular organisms are capable of :-
• Independent existence
• Performing the essential functions of life.
Unicellular organism
, CELL : THE UNIT OF LIFE
Anything less than a complete structure of a cell does not ensure
independent living.
Bacteriophage (V
History of cell
First cell discovered by :-
Robert Hooke in Cork cells (Dead cell)
First living cell discovered by :-
Anton Von Leeuwenhoek (living cell)
Nucleus discovered by :-
Robert Brown
By:-Raushan Kuma
, CELL : THE UNIT OF LIFE
What is Cell ?
• Cell is the structural and functional unit of an
organism.
Unicellular organism
• All organisms are composed of cells.
• Some are composed of a single cell and are
called unicellular organisms.
• While others composed of many cells, are
called multicellular organisms.
Multicellular organis
, CELL : THE UNIT OF LIFE
Minimum Requirement in a Cell
Cell Membrane
Cytoplasm Complete cell
(show independent existence
Genetic material
Unicellular organisms are capable of :-
• Independent existence
• Performing the essential functions of life.
Unicellular organism
, CELL : THE UNIT OF LIFE
Anything less than a complete structure of a cell does not ensure
independent living.
Bacteriophage (V
History of cell
First cell discovered by :-
Robert Hooke in Cork cells (Dead cell)
First living cell discovered by :-
Anton Von Leeuwenhoek (living cell)
Nucleus discovered by :-
Robert Brown
