Across
- 9. system that produces hormones
- 10. process that plants loses water
- 13. Plants make their own food
- 15. Absorbs light for photosynthesis
- 16. Different tissues that work together
- 18. zygote divide to form a ball of cells
- 19. fusion between sperm and ovum
- 20. S.I unit for temperature
Down
- 1. filled with cell sap
- 2. early stage of the maturity
- 3. Radioactive materials
- 4. Place where the embryo develops and grows
- 5. small pore between the guard cells
- 6. Produces energy for reactions in cell
- 7. mass per unit volume of the material
- 8. breakdown of the lining of the uterine wall
- 10. organ that produces male gametes
- 11. used to measure electric current
- 12. poisonous chemical
- 14. maintenance the internal environment of an organism
- 17. errors are caused by using measuring instruments