Evolution Crossword

Author of "On the Origin of Species"
In a population, natural selection acts on _______.
_______ is the amount of time it takes for half of the isotope in a sample to decay into its product isotope.
What is a change in species over time that makes the offspring different from their ancestors?
Pattern of evolution where a species is stable for a long time then rapidly changes
What were the islands Darwin visited?
Preserved remains of ancient organisms are known as ________.
Natural selection is also known as survival of the _______.
Similiar structures
A collection of alleles founf in all of the individuals of a population
What is an observable change in the allele frequencies of a population over a few generations?
Process in which two or more species evolve in response to changes in eachother
The most common fossils result from _____________.
Atoms of an element that have the same number of protons, but a different number of neutrons.
Elimination of a species from Earth