Correct Option (c)
The statement implies that within any given population, there exists genetic variability. When pesticides are applied, individuals possessing a pre-existing genetic trait that confers resistance (e.g., an enzyme for detoxification) are more likely to survive. These resistant individuals then reproduce, passing on their advantageous traits to their offspring. Over successive generations, the proportion of resistant individuals in the population increases due to this selective pressure, illustrating the principle of natural selection.
Incorrect Options:
Options (a) and (b) are inaccurate as they present an oversimplified or exaggerated view of pesticide resistance.
- Option (a) suggests that pesticide resistance is "very natural for many organisms." While the potential for resistance to evolve exists due to genetic variability, resistance itself is not an inherent or common trait for "many organisms" without the selective pressure of pesticide application. It is an evolved response to a specific environmental challenge.
- Option (b) claims that pesticide resistance is a "universal phenomenon." This is incorrect. The passage describes the evolution of resistance, which occurs under specific conditions of genetic variability and repeated pesticide exposure. It is not a universally present characteristic across all organisms or populations, but rather a consequence of natural selection acting on existing variations.