Mechanisms of change

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Across
  1. 1. structures A structure that is present in an organism but no longer serves its original purpose
  2. 3. selection A natural process resulting in the evolution of organisms best adapted to the environment,
  3. 6. changes in the genetic material,
  4. 7. A hypothesis that has been tested with a significant amount of data,
  5. 8. evolution evolution of one or more closely related species into different species; resulting inadaptations to different environmental conditions,
  6. 9. Ability of an animal to look like another more harmful animal,
  7. 11. Formation of new species,
  8. 12. Principle principle that states that allele frequencies in a population remain constant unless one or more factors cause those frequencies to change,
  9. 14. drift A change in the gene pool of a population due to chance,
  10. 15. Change over time,
Down
  1. 2. traits that improve an individual's ability to survive and reproduce,
  2. 4. A trace of an ancient organism that has been preserved in rock,
  3. 5. hypothesis proposes that early eukaryotic cells acquired the precursors of mitochondria and chloroplasts by engulfing certain types of bacteria,
  4. 10. evolution Unrelated species evolve similar traits,
  5. 13. pool All the genes, including all the different alleles for each gene, that are present in a population at any one time,