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How did Darwin explain his theory?

What does it mean by the term the 'fittest' organisms survive?

Why do organisms show a wide range of variation?

What are mutations?

Why are mutated genes sometimes an advantage?

How can we make sense of how organisms are related?

What is natural classification system?

What are the largest groups in systems called?

What are the main kindgoms

What are the smallest groups in classification systems called?