Across
- 2. the process or act of trying to win
- 7. money or things that are available for a particular use
- 8. everything that surrounds a particular type of living thing and affects its growth and health
- 9. of the Fittest 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
- 11. to fill with more inhabitants than available resources can sustain
- 13. in biology, a change in an organism, over time, that better enables it to survive and multiply
- 14. an animal being hunted, caught, and eaten by another animal
- 16. to have young or offspring
- 17. Selection the identification by humans of desirable traits in plants and animals, and the steps taken to enhance and perpetuate those traits in future generations.
Down
- 1. variety
- 3. the theory that describes how all life forms developed from simpler life forms by changes that took millions of years
- 4. a group of living things that can mate with one another but not with those of other groups
- 5. 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
- 6. an animal that hunts other animals for food
- 10. selection 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
- 11. the child or young of a particular human, animal, or plant
- 12. the degree to which something varies; amount of change or difference
- 15. a sudden, apparently abnormal change or alteration in a genetically determined structure, as opposed to gradual evolutionary change