Unit 7 Choiceboard

123456789101112131415161718192021
Across
  1. 2. Small scale change in allele frequencies in a population
  2. 3. Pattern of evolution - long periods of genetic equilibrium interrupted by periods of rapid change
  3. 6. Pattern of evolution - when a small group of species diversify into many distinct forms or new species
  4. 8. Fertilized egg, embryo of a new developing organism
  5. 9. Evidence for evolution - random neutral mutations accumulate in the genome of a species and can be used to determine how long ago an evolutionary split between species occurred
  6. 11. Pattern of evolution - when 2 species that closely interact evolve in response to one another/together over time
  7. 13. Theory that explains how the first eukaryotic cells came from a symbiotic relationship between cooperating prokaryotic cells
  8. 15. Pattern of evolution - when a species is no longer present on earth
  9. 17. Survival of the fittest - those organisms best suited to their environment survive and reproduce - proposed by Charles darwin
  10. 19. Evidence for evolution - collection of fossilized remains that show changes in organisms through geologic time
  11. 20. Evidence for evolution - unused structures or organs in an organism that are remnants of ancestral species
  12. 21. Evidence for evolution - when different structures of an organism are used for similar functions - ex internal structure of butterfly wings vs bat wings vs bird wings
Down
  1. 1. 2 part scientific naming system used to identify organisms
  2. 4. Scientific classification that organizes living things into related categories - ex domain, kingdom, phylum, class, order, family, genus, species
  3. 5. Large scale change in species, formation of new species, or change over long periods of time (millions of years)
  4. 7. Newly adapted/evolved characteristic, used to separate species/taxonomic groups on a cladogram
  5. 10. Evidence for/pattern of evolution - unrelated organisms will evolve to look similar due to similar environmental demands - ex shark and dolphin
  6. 12. Evidence for evolution - study of the early stages of development in a zygote/developing embryo
  7. 14. Evidence for evolution - when the same structures (ex bones) of different species are used in different ways - ex bones of a bat used to fly while bones of a horse used to run
  8. 16. Evidence for evolution - master control genes that determine placement of limbs/organs and development in organisms
  9. 18. Section of the evolutionary tree that shows derived characters and ancestral/evolutionary groups of organisms