Chapter 6 - Evolution and Biodiversity: Origins, Niches, and Adaptation

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Across
  1. 2. E.g. bacteria and cyanobacteria; single-celled, microscopic prokaryotic organisms
  2. 6. Evolution consisting of long periods of little change in species with brief periods of rapid change
  3. 10. Changes in the gene pool of one species leading to changes in the gene pool of another species
  4. 14. Type of natural selection that occurs when environmental conditions favor individuals at both extremes of the genetic spectrum
  5. 15. Population was affected by industrial pollution
  6. 19. A change in a population’s gene pool over time
  7. 20. Different molecular forms of a gene
  8. 21. E.g. insects, shrimp, spiders
Down
  1. 1. Process leading to the creation of a new species
  2. 3. Type of natural selection that tends to eliminate individuals on both ends of the genetic spectrum and favor individuals with an average genetic makeup
  3. 4. Sum total of all genes possessed by the individuals of the population of a species
  4. 5. A factor in a population’s environment that causes natural selection to occur
  5. 7. Large-scale movements of the continents
  6. 8. The earth’s first _____________ had formed 4.4 billion years ago
  7. 9. Last era of the dinosaurs
  8. 11. Speciation minus extinction
  9. 12. On the Origin of Species by Means of Natural Selection
  10. 13. Measure of reproductive success
  11. 16. Plants that can live for more than two years
  12. 17. Photosynthetic prokaryotes
  13. 18. Involves movement of genes between populations and can lead to changes in the genetic composition of local populations