Across
- 2. The shape of the lit part of the Moon as seen from Earth
- 5. The path an object takes as it moves around another object
- 7. Something used to represent or explain an idea
- 9. everything (living and nonliving) that surrounds an organism
- 14. The process by which one population evolves into two or more different species
- 15. The process by which species adapt to environmental changes over a very long time
- 16. A more recent species that evolved from an ancestor population
- 18. A related organism from a previous generation
- 19. an instruction for making a protein molecule
- 20. Having died out completely and no longer alive anywhere on Earth
- 21. A body structure in two or more species that features the same parts
- 23. The line between the light and dark parts of the Moon
- 26. any difference in traits between individual organisms
- 27. the number of individuals with each trait in a population
- 28. a type of large molecule that performs important functions inside organisms
- 30. To shine light on something so it can be seen
Down
- 1. a trait that makes it more likely that an individual will survive in a specific environment
- 3. Something that repeats over time
- 4. A part of an organism
- 6. a trait that makes it less likely that an individual will survive in a specific environment
- 8. a group of the same type of organism living in the same area
- 10. To receive genes from a parent
- 11. The Sun and everything that orbits it
- 12. the process by which the distribution of traits in a population changes over many generations
- 13. a group of organisms of the same kind (in one or more populations) that do not reproduce with organisms from any other group
- 17. a group of individuals born and living at about the same time
- 22. Evidence of life from the past, such as fossilized bones, footprints, or leaf prints
- 23. a specific characteristic of an individual organism
- 24. Sharing a common ancestor population
- 25. When something stays mostly the same over time
- 29. The relative size of objects
