Across
- 2. The cell's control center, directing all of the cell's activities
- 4. Smallest unit of an organism that can perform life functions
- 6. Arthropods that live mainly on land
- 8. Animals without backbones
- 10. Small structures that function as factories to produce proteins
- 12. Mollusks with two shells
- 13. Refers to the way an organism moves
- 14. Group of tissues that work together to perform closely related functions
- 15. Storage area of the cell
Down
- 1. Captures energy from sunlight and uses it to produce food for the cell
- 3. Refers to the internal skeleton found in echinoderms
- 5. Tiny cell structures that carry out specific functions within the cell
- 7. Phylum that includes vertebrates
- 9. Egg-laying mammals
- 11. Multicellular organisms that must eat other organisms for food