Which of these characteristics best help scientists classify organims?

Which process is most responsible for the extinction of most species of plants and animals that have lived on Earth?

What would cause a fox's fur to change color

Which would indicate that a series of fossils represent the evolution of a horse?

Scientists think that dolphins and whales may have evolved from a common ancestor. What supports this?

Which would best allow a species to survive environmental changes?

What can be concluded about homologous structures?

Evolution can best be described as which type of change?

Which is true about fossils?

Why are bird beaks shaped differently?

How are fossils compared to one another for biological classification?

What do scientists most often use to form the basis for biological classification?

Which best describes the relationship between genetic variation and the ability to adapt to one's environment?

Which best describes an inherited trait that gives an organism a survival advantage in its particular environment?

Which would most likely cause an entire species to become extinct?

Which geological event is most likely to cause greater diversity in animal populations?