Natural Selection Crossword Puzzle

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Across
  1. 1. variation among members of different species
  2. 4. carries genetic information
  3. 6. the process by which new species form
  4. 9. a trait that allows an organism to better survive in its environment
  5. 11. a group of similar organisms that can breed and produce fertile offspring
  6. 13. the difference in the physical traits of an individual from those of other individuals of the group
  7. 15. the variety of organisms living on Earth or in a specific area, indicated by the number of species
  8. 16. the change in species over time
  9. 18. the permanent loss of a species
  10. 19. A random change in the sequence of an organism’s DNA
  11. 20. The prevalence of a particular allele or genotype within a population (ratio)
  12. 21. change in allele frequencies within a population over time
Down
  1. 2. One of several different versions (alternative forms) of the same gene
  2. 3. the extinction of very large numbers of species in a relatively short period
  3. 5. a group of individuals of the same species that reproduce with one another and inhabit a common area
  4. 7. Illustrate how different species or groups of species are related (starts with P)
  5. 8. changes that lead to new species
  6. 10. process by which organisms with variations that are favorable in their environment (organisms that have inherited beneficial adaptations) survive and reproduce
  7. 12. variation among individuals of the same species (within species)
  8. 14. All the alleles carried by members of a population
  9. 17. carries energy