Evolutionary Evidence and Mechanisms

What is biological evolution?

• A change in an individual's traits during its lifetime.

• A product becoming more complex over time.

• A change in a population's inherited traits over generations.

• An organism becoming stronger.

Which mechanism of evolution describes a change in a population's genetic makeup due to a random chance event?

• Gene Flow

• Mutations

• Genetic Drift

• Natural Selection

In a population of grasshoppers, green grasshoppers are better camouflaged and survive to reproduce more often than grasshoppers with orange spots. What mechanism of evolution is this an example of?

• Gene Flow

• Mutations

• Genetic Drift

• Natural Selection

What type of evidence for evolution involves comparing DNA, amino acids, and proteins between different organisms?

• Molecular Homologies

• Anatomical Homologies

• Developmental Homologies

• Fossil Record

What is the main difference between homologous and analogous structures?

• Homologous structures have similar functions, while analogous structures have different functions.

• Homologous structures come from a shared common ancestor, while analogous structures do not.

• Homologous structures are found in animals, while analogous structures are found in plants.

• Homologous structures are always visible, while analogous structures are microscopic.

Which of the following best describes a vestigial structure?

• A structure that has a similar function in different species.

• A structure that is fully functional and essential for survival.

• A structure inherited from an ancestor that has lost most or all of its original function.

• A structure that develops only in embryos and disappears before birth.

How does the study of embryology provide evidence for evolution?

• It shows that all embryos look exactly the same at every stage of development.

• It reveals similarities in the early development of different organisms, suggesting a shared ancestry.

• It proves that organisms can change their developmental stages to adapt to new environments.

• It helps scientists predict the exact future evolutionary path of a species.

What can scientists learn about evolution by studying the fossil record?

• The exact color and behavior of ancient organisms.

• How characteristics of organisms have changed over long periods of time.

• The precise age of every organism that ever lived.

• Only about animals, not plants or bacteria.