Across
- 4. The material in a cell's nucleus that carries all the information about what traits a living thing may have
- 6. Food ____, the order in which organisms are eaten by other organisms
- 7. No longer in existence
- 8. Something in the environment that causes the body to react, such as sight or sound
- 12. A molecule that is necessary for cell growth, repair and energy
- 14. All the living and nonliving things that surround us and affect us
- 15. The smallest part of a living thing that can carry out all the activities needed for life
- 17. The process of creating an exact genetic copy of an organism
- 20. Differences among species
- 21. The study of hereditary or how traits are passed from parents to offspring
- 23. Global _____, an increase of the average temperature of the earth and oceans
Down
- 1. The gradual change in a species over a long period of time
- 2. A change in the genetic information within a cell
- 3. The process by which plants use carbon dioxide, sunlight and water to make food
- 5. A trait that makes an animal or plant better able to live in its environment
- 9. An animal with a backbone
- 10. A part of DNA that carries a specific trait
- 11. A protein made by white blood cells that attack and kill germs
- 13. The body's system for fighting disease causing germs
- 15. A consumer that eats other animals
- 16. A living thing
- 18. An area in which living and nonliving things interact
- 19. The study of all living things
- 22. The study of the relationship between organisms and their environment