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

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