2/19 Bell Ringer

What is natural selection?

• A process where humans breed organisms for specific traits

• A process where organisms with beneficial traits survive and reproduce

• A method scientists use to modify DNA

• A way for animals to learn new behaviors

Which of the following is an example of artificial selection?

• Birds developing different beak shapes over time

• Farmers breeding cows to produce more milk

• Trees growing taller to reach sunlight

• A species of lizard blending in with the environment

How does artificial selection affect populations over time?

• It allows only the strongest organisms to survive

• It increases the chance of random mutations

• It changes traits based on human preferences

• It causes species to go extinct faster

Which of these best describes selective breeding?

• Animals evolving to adapt to their surroundings

• Humans choosing organisms with desirable traits to reproduce

• Organisms changing due to environmental pressures

• A sudden change in the genetic code of an organism

Why do some traits become more common in a population over generations?

• Organisms with beneficial traits survive and reproduce more successfully

• All traits appear randomly in every generation

• Scientists select traits for organisms in the wild

• Organisms develop new traits instantly when needed

What is an adaptation?

• A sudden change in an organism’s DNA

• A characteristic that helps an organism survive and reproduce

• A new species forming in one generation

• A structure that has no function in an organism

Which of the following is an example of a structural adaptation?

• Bears hibernating in winter

• Birds having long beaks for reaching nectar

• Rabbits running away from predators

• Fish swimming in schools

Which type of adaptation involves a change in body processes?

• Structural adaptation

• Behavioral adaptation

• Physiological adaptation

• Artificial adaptation

What is the main reason variations within a population are important for survival?

• They allow individuals to look different from one another

• They help some individuals survive environmental changes

• They prevent organisms from reproducing

• They make species evolve instantly

What would most likely happen to a population if the environment changed and no individuals had beneficial adaptations?

• The species would evolve instantly

• The species would go extinct

• The species would develop new traits immediately

• The species would stop reproducing