| Direction: For question numbers two statements are given-one labeled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes [a], [b], [c] and [d] as given below. |
| Assertion Schleiden and Schwann proposed the cell theory. |
| Reason His cell theory states that all plants and animals are composed of cells. |
A) Both A and R are true and R is correct explanation of the A
B) Both A and R are true, but R is not the correct explanation of the A
C) A is true, but R is false
D) A is false, but R is true
Correct Answer: B
Solution :
| [b] Both A and R are true, but R is not the correct explanation of A. |
| 'All plants and animals are composed of cells' was presented as cell theory by Schleiden and Schwann (1838-39). Rudolf Virchow modified and expanded this earlier theory by suggesting that 'all cells arise from pre-existing cells'. |
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