Across
- 1. surrounds outside of all cells; controls what enters or leaves the cell
- 3. the study of life
- 4. Method a series of steps used to answer questions and generate more questions.
- 5. the basic unit of life; comes in many shapes and sizes
- 7. structures within a cell
- 8. uses energy from sunlight to make own food; gives plant green color
- 9. supports and protects plant cells; found outside the membrane
- 10. digests excess cell parts, food particles, and invading bacteria or viruses
- 13. an infective agent that multiplies within the cells of a host.
- 14. a unicellular organism lacking a membrane-bound nucleus
- 16. living things
- 18. reproduce or make an exact copy of
- 21. a representation of a phenomenon or process
- 22. cells working together
- 23. combination of elements
- 24. single-celled organisms that can cause disease
Down
- 2. composed of many cells
- 5. the jelly-like substance inside a cell
- 6. heart, brain, stomach, etc.
- 11. an organism of one or more cells with membrane-bound nuclei
- 12. smallest unit of matter
- 15. composed of one cell
- 17. controls the normal activities of the cell
- 18. when an organism reacts to some outside force or stimulus
- 19. fluid filled sacks for storage
- 20. "powerhouse" of the cell