Natural Selection

Which of the following describes what is meant by "natural selection?"

• An organism will survive no matter what its adaptations may be

• An organism with adaptations that allow it to obtain resources and reproduce more effectively than others will survive

• An organism with adaptations that do not allow it to reproduce as effectively as others will survive

• No organisms will survive

Which best describes an adaptation?

• A trait that helps an organism to survive in its environment

• A trait that does not help an organism to survive in its environment

• A trait that the organism can change when he wants

• The place where an organism lives

Which of the following is an environmental pressure that might affect the survival of a species?

• Predators

• Type of food availability

• Seasonal changes

• All of the above

Different phenotypes within a population affect their ability to survive

• True

• False

Which organism is NOT "fit" for their environment?

• A white mouse living on newly formed, dark rock

• A giraffe with a long neck, reaching food in tall trees

• Cuttlefish that change its color and texture to blend into its environment

• African elephants that use their ears to keep cool in the hot desert

When genes/alleles move from one population to another, due to how geographically close populations are to each other

• Genetic drift

• Gene flow

• Mutation

• Natural selection

Which description best describes an adaptation

• A trait that an organism can change when it wants

• A trait that does not help an organism to survive in its environment

• The place where an organism lives

• A trait that helps and organism to survive in its environment

Which of the following variations would help members of a rabbit population to survive if the environment turned very hot?

• Ability to jump high

• Ability to run faster

• Ability to produce thinner fur

• Ability to eat more

Over time, natural selection can change how often a trait is seen within a population

• True

• False

The random change (increase OR decrease) of allele frequencies in a population

• Mutation

• Gene flow

• Migration

• Genetic drift