Pollution in a marine environment has had a devastating effect on turtles in the area. However, some of the turtles survive and, over time, scientists determine that the turtle population has evolved. Which of the following is NOT a requirement for evolution by natural selection to occur in the turtle population? Individuals in the turtle population must possess beneficial traits that help them survive and reproduce.

Individuals in the turtle population must evolve traits that made them resistant to the pollution.

The turtles must be capable of producing more offspring than will be able to survive.

The turtle population must have naturally occurring genetic variation.