Final answer:
Beneficial mutations are genetic changes that increase an organism's chances of survival or reproduction.
Step-by-step explanation:
Beneficial mutations are genetic changes that have a positive effect on the organism and increase its chances of surviving or reproducing.
For example, let's consider a mutation that causes a change in an animal's skin color. If the environment becomes lighter, individuals with the mutated gene may have a lighter skin color, making them better camouflaged and increasing their chances of survival.
Beneficial mutations play a crucial role in evolution by providing organisms with adaptations that help them adapt to changes in their environment.