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