Natural Selection Crossword

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Across
  1. 4. corresponding structurally, often because of a common evolutionary origin
  2. 9. a condition that causes harm to the health of a person, animal, or plant; illness; sickness
  3. 10. a natural process of evolution in which the organisms that are best adapted to their environment survive and are able to reproduce, while those that are weak leave fewer or no offspring.
  4. 12. of, pertaining to, or being a vestige, esp. an anatomical one
  5. 14. in biology, a change in an organism, over time, that better enables it to survive and multiply
  6. 15. the theory that describes how all life forms developed from simpler life forms by changes that took millions of years
  7. 17. everything that surrounds a particular type of living thing and affects its growth and health
  8. 19. an animal that hunts other animals for food
  9. 20. to fill with more inhabitants than available resources can sustain
  10. 23. the branch of science that concerns the formation and development of embryos
  11. 24. a variety
Down
  1. 1. the degree to which something varies; amount of change or difference
  2. 2. a way of hiding something by covering or coloring it so that it looks like its surrounding
  3. 3. the child or young of a particular human, animal, or plant
  4. 5. in biology, the evolutionary principle that only the forms of plants or animals best suited to or most easily able to adapt to existing conditions will survive, while other less suited forms will become extinct
  5. 6. a group of living things that can mate with one another but not with those of other groups
  6. 7. a sudden, apparently abnormal change or alteration in a genetically determined structure, as opposed to gradual evolutionary change
  7. 8. an animal being hunted, caught, and eaten by another animal
  8. 11. the process or act of trying to win
  9. 13. in biology, similar in form or function, but of different evolutionary origin
  10. 16. to have young or offspring
  11. 18. the diversity of life forms on earth or part of the earth, including diversity of species, genes, and ecosystems, esp. when regarded as providing the optimal conditions for evolution
  12. 21. money or things that are available for a particular use
  13. 22. something that pollutes, esp. a waste substance that makes air, water, or land impure or unhealthy; contaminant.