Across
- 3. the process of species changing over time
- 5. fighting over resources like food, water, and space
- 7. how the body of an organism is built
- 9. the selection where nature chooses the best traits fit for an environment
- 11. any differences in traits between one species
- 12. producing more offspring than can possibly survive (similar to overpopulation)
- 14. structures that are built similarly, but used for different functions
- 15. any trait or behavior that helps an organism survive
- 16. ancient remains of organisms that lived long ago
Down
- 1. structures that still exist but are no longer useful to the organism
- 2. the man responsible for starting the research of natural selection
- 3. a young and developing organism that looks very similar to other species before birth
- 4. the genetic structure in cells responsible for traits
- 6. and characterisitic that can be inherited and passed down
- 8. the selection where humans choose the best traits they desire
- 10. structures that are built differently, but used for similar functions
- 13. the part of finches that changed based on the food they ate