UPSC Prelims 2005·GS1·science-and-technology·science and technology

Assertion (A): Amoeba is reproduced by fission. Reason (R): All unicellular organisms are reproduced by asexual methods.

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  1. ABoth (A) and (R) are individually true and R is the correct explanation of A
  2. BBoth (A) and (R) are individually true and R is not the correct explanation of A
  3. CA is true but R is falseCorrect
  4. DA is false but R is true

Explanation

Amoeba is a unicellular organism that reproduces through binary fission, which is an asexual process. Therefore, the assertion is correct. However, the reason is false because not all unicellular organisms reproduce solely by asexual methods. While asexual reproduction is common, many unicellular organisms, such as certain species of Paramecium and yeast, can also undergo sexual reproduction or genetic recombination through processes like conjugation. Since the assertion is true but the reason is a false generalization, the correct option is C.
science-and-technology: Assertion (A): Amoeba is reproduced by fission. Reason (R): All unicellular organisms are reproduced by asexual methods.
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