Biology Evolution Crossword

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Across
  1. 4. the change in frequency of an existing gene variant in the population due to random chance
  2. 5. the identification by humans of desirable traits in plants and animals, and the steps taken to enhance and perpetuate those traits in future generations
  3. 8. the inability of a species to breed successfully with related species due to geographical, behavioral, physiological, or genetic barriers or differences
  4. 10. a defense or tactic that organisms use to disguise their appearance, usually to blend in with their surroundings
  5. 12. the combination of all the genes (including alleles) present in a reproducing population or species
  6. 13. the differential survival and reproduction of individuals due to differences in phenotype
  7. 14. the science of determining the relative order of past events without necessarily determining their absolute age
  8. 16. the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock
  9. 17. the history of life as documented by fossils
  10. 18. the complete set group of individuals, whether that group comprises a nation or a group of people with a common characteristic
  11. 19. the process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth
  12. 20. those from organisms that share a common ancestor
  13. 21. the action or process of adapting or being adapted
  14. 22. Early stage in the development of humans and other animals or plants
Down
  1. 1. occurs when two populations are separated by geographic barriers such as rivers, mountains, or bodies of water
  2. 2. features of different species that are similar in function but not necessarily in structure and which do not derive from a common ancestral feature
  3. 3. the similarity of one organism (the mimic) to another (the model) that enhances the mimic's fitness through its effect on the behavior of a third party, the operator
  4. 6. a broad and holistic science that examines spatial patterns of biological diversity
  5. 7. an organism's ability to survive and reproduce in a particular environment
  6. 9. a major principle of stratigraphy stating that within a sequence of layers of sedimentary rock, the oldest layer is at the base and that the layers are progressively younger with ascending order in the sequence
  7. 11. (of a species, family, or other group of animals or plants) having no living members; no longer in existence
  8. 15. various cells, tissues, and organs in a body which no longer serve a function