Which of the following scenarios best exemplifies the concept of gene mutation?
A) A bird population adapts to a changing environment by developing longer wingspan over successive generations.
B) A group of mammals colonizes an isolated island, leading to the emergence of new species with distinct characteristics.
C) A virus spreads rapidly through a population, causing significant genetic changes in the affected individuals.
D) An individual plant acquires a novel trait through epigenetic modifications and passes it on to its offspring.
Example A: Bird population adapting to a changing environment
Example B: Mammals colonizing an isolated island
Example C: Genetic changes caused by a spreading virus
Example D: Individual plant acquiring a novel trait through epigenetic modifications
Viruses can introduce mutations into the host's genetic material, leading to alterations in gene structure and expression. These genetic changes can result in variations within the population affected by the virus. Hence, option 4 is the correct answer.