Concept:Variation provides the genetic diversity that helps a population adapt and survive when environmental conditions change.
Explanation:Genetic variation arises from mutations, genetic recombination during reproduction, and gene flow between populations.
This diversity allows some individuals to possess traits that help them cope with challenges such as climate shifts, new predators, or diseases.
Under changing conditions, individuals with advantageous traits are more likely to survive, reproduce, and pass on those traits to the next generation.
This process is the basis of natural selection, as described by Charles Darwin.
Populations with higher variation have a greater chance of persisting and evolving, reducing the risk of extinction.
For example, antibiotic resistance in bacteria and differences in beak sizes among Darwin’s finches show how variation drives adaptation.
Now, evaluate the given options:
Option A is correct because variation directly increases survival chances under environmental changes.
Option B is incorrect – identical individuals lack diversity, making the population vulnerable to change.
Option C is incorrect – evolutionary benefits of variation take many generations, not instant results.
Option D is incorrect – variation influences adaptability, not the speed of reproduction.
Answer:Option A – It increases the chance of survival under changing environmental conditions.