Question

ASSERTION- Rudolf Virchow proposed cell theory.
REASON -His cell theory states that all plants and animals are composed of cells.
a. If both assertion and reason are true and reason is the correct explanation of assertion.
b. If both assertion and reason are true, but reason is not correct explanation of assertion.
c. If assertion is true, but reason is false.
d. If both assertion and reason is true.

Answer 1

Answer:

B) If both assertion and reason are true, but reason is not correct explanation of assertion

Explanation:

1) The cell theory was proposed by two scientists- Schleiden (1838)and Schwann (1839). It says that all the plants and animals are composed of cells and the cell is the basic unit of life.

2) The cell theory was further expanded and corrected by Virchow (1855) by suggesting that all cells arise from pre-existing cells.

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Answer 2

b) If both assertion and reason are true, but the reason is not the correct explanation of assertion.

Explanation:

• Theodor Schwann and Schleiden proposed the classical cell theory in 1839.
• As per the cell theory, Every living organism present on earth is made up of cells.
• The cell is the basic structural/organizational unit of all organisms.
• Rudolph Virchow, in 1858 added a concept and proposed modern cell theory.  
• The theory states that all cells arise from pre-existing cells to lay the groundwork for cellular pathology.