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Across 2. The name of Darwin's book (4 words) 5. _____ _____ brought up arguments against natural selection (2 words) 7. Darwin is known as the _____ of _____ (2 words) 9. _____ _____ are anatomically similar structures inherited from a common ancestor (2 words) 11. Darwin and his wife had _____ children 12. _____ _____ are newly evolved features that do not appear in the fossils of common ancestors (2 words) 15. Before Darwin's trip, he believed that plants and animals were _____ 17. The islands Darwin explored (2 words) 18. _____ _____ are more primitive features that do not appear in the ancestral form (2 words) 19. An _____ is an early, pre-birth stage of an organism's development 21. The selective breeding of organisms selected for certain traits in order to produce offspring with those traits is known as _____ _____. (2 words) 22. A theory of evolution based on four main ideas: excess of reproduction, variations, inheritance, and the advantages of specific traits in an environment is known as _____ _____. (2 words) 23. What type of tortoise is only found on the Galapagos Islands? (2 words) 26. Darwin's journey lasted _____ years 27. Individuals in a population differ from one to another 28. Darwin was born on _____ 12, 1809 29. Morphological adaptions that allow an organism to blend with their environment 30. One species evolves to resemble another species 31. Darwin noticed the variations in beaks in what kind of bird?

Down 1. Some variations allow the organism to have more offspring than another organism (2 words) 3. What book was Darwin reading that influenced his thinking as he observed fossils? (3 words) 4. The study of the distribution of plants and animals on Earth 6. _____ _____ are structures that are the reduced forms of functional structures in other organisms (2 words) 8. Variations are inherited from parents 10. Darwin married his _____, Emma Wedgwood 13. Populations produce more offspring than can survive 14. Darwin was born on the same day as _____ _____ (2 words) 16. The ship Darwin traveled on (2 words) 20. The Galapagos Islands were located off the coast of _____ _____ (2 words) 24. Heredity changes in groups of living organisms over time 25. Darwin was born in _____ 26. A measure of the relative contribution an individual trait makes to the next generation