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U7W3 Homework

Across
a trait that helps an organism survive and reproduce.
the process of selecting a few organisms with desired traits to severe as parents of the next generation.
the process by which individuals that are better adapted to their environment are more likely to survive and reproduce.
The name of the ship Darwin traveled on for 5 years around South America
similar structures that related species have inherited from a common ancestor.
the minerals that replace the remains, changing them into rock.
is the preserved remains or traces of an organism that lived in the past.
a way scientists determine which of two fossils is older.
any difference between individuals of the same species.
an island in the Pacific Ocean that is known for its large number of endemic species.
Down
a theory that all species of life have descended over time from common ancestors.
a diagram that shows how scientist think different groups of organisms are related.
well-tested concept that explains a wide range of observations.
a technique that allows scientists to determine the actual age of a fossil.
the gradual change of a species over time.
Moths that evolved because of human pollution during the Industrial Revolution.
a hollow space that in sediment in the shape of an organism or part of an organism.
a group of similar organisms that can mate with each other and produce fertile offspring.