Across
- 2. the formation of a new species
- 4. reproduction involving two parents
- 5. passed from parents to offspring
- 9. able to be passed down genetically
- 10. a group of organisms born around the same time
- 11. something that helps an organism survive or reproduce
- 14. something that makes survival or reproduction harder
- 15. a characteristic or feature of an organism
- 16. a change in DNA
- 19. resources that are not available in unlimited amounts
- 20. the surroundings where an organism lives
- 21. a trait that helps an organism survive in its environment
Down
- 1. things organisms need to survive, like food, water, and shelter
- 3. the struggle between organisms for the same resources
- 6. differences between organisms in the same species
- 7. when there are more organisms than the environment can support
- 8. organisms trying to get the same limited resources
- 10. differences in genes among individuals
- 12. body parts with similar functions but different origins
- 13. environmental factors that affect survival
- 17. helpful for survival or reproduction
- 18. the young produced by parents