chapter 12 science

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Across
  1. 3. Is the early stages of development of an organism
  2. 4. Species that have vestigial bind leg bones
  3. 6. CELLS A cell the develops into a reproductive cell
  4. 7. Species that are similar to a zebra
  5. 10. Members of the group that later gave rise to the modern human being
  6. 12. A population of organisms with similar genes
  7. 13. When a population moves from its current habitat to a new one
  8. 15. A drug used to treat infections caused by microorganisms and bacteria
  9. 18. Remains of an organism
  10. 19. Similar structures but have different anatomies
  11. 20. Structures that are inherited that are often smaller and
  12. 21. FLOW the transfer of genetic material from one population to another
Down
  1. 1. When a portion of a current population becomes isolated due to geographical barriers
  2. 2. STRUCTURES Similar structures but have different anatomies
  3. 5. occurs when there are no physical barriers preventing any members of a species from mating with another,
  4. 8. Structures that evolved from the same ancestral body parts
  5. 9. Is the development of new species
  6. 11. Molecules that build and support body parts
  7. 14. Located in the chromosomes which consists of DNA
  8. 16. When a specific number of species are separated from the rest of the group
  9. 17. Any change in the genes of a population of organisms over a period of time