Across
- 3. consists of twin chains of bonded nucleotides twisted into a helical shape
- 5. pure substances that cannot be broken down into a simpler substance
- 7. no charge
- 8. negative(-) charge and determines chemical behavior
- 10. all living organisms require a way to break down energy. Plants use the sunlight as energy while Humans use food.
- 12. positive(+) charge
Down
- 1. all living organisms maintain a stable internal environment even when the external environment changers
- 2. anything that takes up space and has mass
- 4. all living organisms produce offspring of some kind
- 6. atoms that share electrons
- 9. all living organisms get larger and develop greater
- 11. the smallest unit having having chemical and physical properties of the element