Natural selection vocabulary

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