Vocabulary Practice

6. a plants response to gravity.
8. the body system that allows the body to move.
9. the body system includes the brain, spinal cord, and a complex network of nerves.
11. a plants response to stimuli.
13. a plants response to light.
14. how the organism reacts to a stimulus and results in a change in behavior.
15. the body system that gives it shape, allows movement, makes blood cells, provides protection for organs and stores minerals

1. a plants response to touch.
2. the control center of a cell.
3. a stimulus that comes from the external environment
4. The process by which the body's internal environment is kept stable in spite of changes in the external environment.
5. rigid outer layer of the cell that provides shape, support and protection.
7. any change in an organism’s environment that causes the organism to react.
10. a part of the cell that stores water and nutrients.
12. a stimulus that comes from inside an organism.