Question 23
Cell theory was given by

(a) Virchow, Haeckel and Hooke
(b) Schleiden, Schwann and Virchow
(c) Haeckel and Hooke
(d) None of these

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Solution

(b) Schleiden, Schwann and Virchow

The credit for proposing the cell theory is given to the 3 German scientists - Schleiden, Schwann and Virchow.

Cell theory has 3 postulates:

1. Cells are the basic unit of structure in every living thing.

2. New cells are formed from other existing cells.

3. The cell is the fundamental unit of structure, function and organization in all living organisms.

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Question 23
Cell theory was given by

(a) Virchow, Haeckel and Hooke
(b) Schleiden, Schwann and Virchow
(c) Haeckel and Hooke
(d) None of these

Question 22
Who made the famous statement 'Cells arise from pre-existing cells'?

(a) Haeckel
(b) Virchow
(c) Hooke
(d) Schleiden

Q. Assertion :Rudolf virchow modified the hypothesis of cell theory given by Schleiden and Schwann. Reason: Cell theory says that all cells arise from pre-existing cells.

Question 21
Who introduced the system of scientific nomenclature of organisms?

(a) Robert Whittaker
(b) Carolus Linnaeus
(c) Robert Hooke
(d) Ernst Haeckel

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Cells

Standard IX Biology

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Question 23 Cell theory was given by (a) Virchow, Haeckel and Hooke (b) Schleiden, Schwann and Virchow (c) Haeckel and Hooke (d) None of these

Question 23
Cell theory was given by

(a) Virchow, Haeckel and Hooke
(b) Schleiden, Schwann and Virchow
(c) Haeckel and Hooke
(d) None of these