1									2			3
									4																				5
																					6
			7				8								9
															10			11
												12						13
14																												15
																									16
																			17
18																		19
			20																					21
						22
23																														24
																											25
	26
																						27
					28
	29																									30
						31
															32
			33
														34

Across 1. ability of an organism to survive and reproduce in its environment 4. natural selection arising through preference by one sex for certain characteristics in individuals of the other sex. (2 Words) 9. information about past life, including the structure of organisms, what they ate, what environment they lived in, and the order in which they lived (2 Words) 11. able to be inherited, passed from parents to their children 13. an organism or group leaving an area to a new another area 14. any trait that can be directly linked to what is contained in an individual’s DNA and passed on to following generations (2 Words) 16. a series of organisms, populations, cells, or genes connected by a continuous line of descent from ancestor to descendent 18. genetic makeup of an organism 19. random fluctuations in the numbers of gene variants in a population; takes place when the occurrence of alleles increases and decreases by chance over time (2 Words) 22. form of natural selection in which the entire curve moves; occurs with individuals at one end of a distribution curve have higher fitness than individuals in the middle or at the other end of the curve (2 Words) 23. specific characteristic that varies from one individual to another 26. an organism or group coming into an area from another area 27. formation of a new species 28. physical characteristics of an organism 29. a limited substance or object in the environment required by an organism for normal growth, maintenance, and reproduction (3 Words) 30. a statement based on repeated experimental observations that describes some aspects of the universe 31. group of similar organisms that can breed and produce fertile offspring 32. the most recent individual from which all organisms in a group are directly descended (2 Words) 33. group of individuals of the same species that live in the same area 34. the external surroundings including all of the biotic and abiotic factors that surround and affect the survival and development of an organism or population

Down 1. the reduced genetic diversity that results when a population is descended from a small number of colonizing ancestors. (2 Words) 2. principle that each living species has descended, with changes, from other species over time (3 Words) 3. "the father of evolution" 5. well-tested explanation that unifies a broad range of observations 6. selection by humans for breeding of useful traits from the natural variation among different organisms (2 Words) 7. change in a kind of organism over time; process by which modern organisms have descended from ancient organism 8. process by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest (2 Words) 10. the tendency of individual genetic characteristics in a population to vary from one another (2 Words) 12. comparing the form and structure of organisms and their specific structural features (2 Words) 15. any movement of individuals, and/or the genetic material they carry, from one population to another (2 Words) 17. process by which two species evolve in response to changes in each other 20. an organism possessing characteristic(s) as a result of mutation deviating from other organisms of the same species or group 21. occur when a population's size is greatly reduced for at least one generation (2 Words) 24. a branching diagram depicting the successive points of species divergence from common ancestral lines 25. inherited characteristic that increases an organism's chance of survival 29. preserved remains or evidence of an ancient organism