Which of the following statements is true?Question 13Answera.Natural selection works on variation already present in a population.b.Individuals evolve through natural selection.c.Organisms evolve structures that they need during their lifetimed.Natural selection works on all genes.

Which statement about natural selection is true?Choose 1 answer:Choose 1 answer:(Choice A)   Natural selection happens because organisms in a population have variations in their inherited traits.ANatural selection happens because organisms in a population have variations in their inherited traits.(Choice B)   Natural selection occurs within an individual’s lifetime.BNatural selection occurs within an individual’s lifetime.(Choice C)   Natural selection can change traits in a population, but has no effect on genes.CNatural selection can change traits in a population, but has no effect on genes.

Select the true statement about mutation and natural selection.Multiple choice question.Natural selection produces mutations.Mutations arise when a population needs to adapt.Natural selection acts on existing mutation.

In which of the following pairs do both evolutionary processes introduce new genetic variation into a population?Question 5Select one:a.natural selection and genetic driftb.mutation and gene flowc.natural selection and gene flowd.gene flow and genetic drift

Which of the four statements below about natural selection are correct? 1. Competition occurs between individuals of the same species. 2. Competition occurs between individuals of different species. 3. Selection can lead to evolution. 4. Selection can lead to extinction. A) 2 and 4 only B) 1, 2 and 4 only C) 1, 3 and 4 only D) 2, 3 and 4 only E) All of the above

Which statement accurately describes the adaptations that result from natural selection.Multiple choice question.Natural selection does not always produce perfectly working adaptations, because it can only work on the genetic variation present in a population.Natural selection always produces perfectly working adaptations, because mutations will sooner or later provide the necessary variation for an adaptation to arise.Natural selection always produces perfectly working adaptations, because it has millions of year to work.