Evolution Crossword

The process by which individuals that are better adapted to their environment are more likely to survive and reproduce than other members of the same species
A fossil formed when minerals replace all or part of an organism
The millions of fossils that scientists have collected
An unstable element that breaks down into a different element
A well-tested concept that explains a wide range of observations
The theory that evolution occurs slowly but steadily
A difference between individuals of the same species
The theory that species evolve during short periods of rapid change
A technique used to determine which of two fossils in older based on the layer of rock in which it was found
Body parts that are structurally similar in related species and that provide evidence for a common ancestor
The process of selecting a few organism with desired traits to serve as parents of the next generation
A diagram that sows how scientists think different groups of organisms are related
A technique used ti determine the actual age of a fossil on the basis of the amount of a radioactive element it contains
The gradual change in species over time
A trait that helps an organism survive and produce