Species Change Over Time

Who established that all species of life descended over time from common ancestors?

• Albert Einstein

• Gregor Mendel

• Charles Darwin

• Robert Hooke

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Which of the following is an example of natural selection?

• Cricket frogs prefer to sleep during the day, while red-eyed tree frogs prefer to sleep during the night.

• Pesticides are sprayed in a field, resulting in an increase in crop growth and a decrease in insect population.

• Rabbits with a mutation for longer, thicker fur survive an unusually cold winter, while many normal rabbits do not survive.

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_______ are unique traits developed by organisms to help them survive, thrive, and reproduce in their particular environment.

• cells

• mutations

• chromosomes

• adaptations

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Natural selection is defined as

• the changes in the characteristics within a population that lead to survival.

• the process by which humans select the most desirable organisms in a population.

• the changes that occur in a population that do not affect survival.

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Change over time is ________.

• Evolution

• Biological Evolution

• Extinction

• Mass Extinction

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Which of the following means "genetic change over time"

• natural selection

• speciation

• evolution

• fitness

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Some organisms have favorable traits that are well-suited to their environments. Organisms with this advantage are more likely to thrive, reproduce, and pass their traits to future generations than organisms without favorable traits. This process is known as

• genetic engineering

• natural selection

• selective breeding

• artificial selection

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How long does it take for a species to change?

• A few years

• Hours

• A very long time

• A month or two

Which term refers to the process by which individuals that are better adapted to their environment are more likely to survive and reproduce?

• natural selection

• overproduction

• competition

• variation

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How is natural selection in the evolution of long necks in giraffes best explained?

• Shorter necked giraffes were likely killed by long necked giraffes.

• Giraffes with longer necks survived because they were better suited to their environment.

• Long necked giraffes mated only with other long necked giraffes.

• Giraffe necks grew longer because of the bone structure of the animals.

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