A species of bird undergoes a rapid evolutionary change in response to a change in its environment. Which of the following is the most likely reason for this rapid evolution?
Q1. A species of bird undergoes a rapid evolutionary change in response to a change in its environment. Which of the following is the most likely reason for this rapid evolution?
Answer: Genetic variation already present in the population
Explanation: Pre-existing variation allows for quick adaptation, most tempting wrong option fails as mutation is rare.