Natural selection & evolution Crossword

This printable crossword puzzle on the topic of Ecology & Evolution has 20 clues. Answers range from 7 to 20 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

Description

Evidence that species existing in the past were very similar to species living in Darwin’s time.
One fossil is compare with another fossil.
Rocks contain radioactive chemicals that break down.
Structure that shows how certain species have inherited a trait from an ancestor.
A diagram that links group of organisms by showing how evolutionary lines, or lineages, branched off from common ancestors.
A characteristic that enables an organism to survive and reproduce in its environment.
Sailed around the world on a boat called Beagle and observed plants and animals.
Darwin observed finches on what island
Population accumulate inherited over time.
Produce more offspring than will survive.
Two populations of the same species become so different that they can no longer interbreed
Over time this may lead to evolution
Method By which individuals of a species that are
Variety of organisms that inhabit our planet.
The disappearance of all members of a species from earth
Which type of rock provides the Best evidence that earth’s environment has changed over time?
Bred only individuals that had the desired trait
A book Charles Darwin wrote about natural selection and methods.
The competition that exists among offsprings to survive when it’s survival of all offspring
Not a direct confrontation between two individuals

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