Across
- 4. living factors that affect an ecosystem
- 7. plants growth in response to force of gravity
- 11. chemical reaction that occurs in plants using radiant energy from sunlight
- 14. turning or bending of plant in response to touch
- 15. nonliving factors that affect an ecosystem
Down
- 1. an action or condition that provokes a response
- 2. chemical messengers that control or regulate specific physiological processes
- 3. process by which a population becomes better suited to its environment
- 5. abiotic factor required for photosynthesis
- 6. response of plant causing it to grow toward light
- 8. self-contained living thing
- 9. force that pulls all objects toward each other
- 10. factors, result from the specific alleles carried by an individual
- 12. pressure, the force of water molecules against the cell wall that allows plants to stand up straight
- 13. process of increasing in size