Across
- 3. change in an organism's surroundings that causes the organism to react, such as cold temperatures
- 8. theory a theory written by 3 scientists
- 9. membrane outside the boundary of an animal cell or inside the boundary of a plant cell that controls materials going in and out of the cell; it is selectively permeable and only allows certain substances to pass through
- 10. action or change in behavior, such as shivering when cold
- 12. ability of organisms to maintain a constant internal condition, such as sweating and shivering in humans; change occurs.
- 14. Science study of living organisms
- 17. ability of an organism to produce offspring, such as making one cell or many cells
- 18. small structure inside a cell that performs a certain function; little organs.
- 21. the basic unit of life
- 22. cell type with a nucleus and many other organelles; all other cells except bacteria
- 24. not living; not made up of one or more cells
- 25. one-cell, such as bacteria, amoeba, paramecia, algae
Down
- 1. important parts of living organisms
- 2. cell type without a nucleus and other organelles; bacterial
- 4. many cells, such as humans, many plants and animals, fungi
- 5. living things made of cells
- 6. too small to see with the human eye
- 7. jelly-like substance found inside all cells where chemical reactions occur
- 9. the important elements or compounds found in living cells, such as water, carbohydrates, lipids, proteins, nucleic acids, and oxygen.
- 11. fuel that cells use to live, such as repairing injured parts, grow, reproduce, make needed materials, and remove wastes
- 13. genetic material
- 15. broad number of living organisms
- 16. suffix that means "the study of"
- 19. process of changing to become larger in size
- 20. - process of changing during an organism's life to produce a more complex organism
- 23. living; made up of or more cells