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6. Why do Guard Cells close at night?

  • To make the stomata open
  • To lose water so that there is enough room for gas exchange
  • To save water without losing out on photosynthesis
  • To rest

7. In mitosis how many cells are formed?

  • Four
  • Twenty
  • Two
  • One

8. For results to be valid they must be what?

  • Reliable
  • False
  • Valid
  • Repeatable

9. Emulsifying fats makes what process happen faster?

  • Digestion
  • Biological catalysts
  • Photosynthesis
  • Respiration

10. True or false: Stem cells are undifferentiated

  • True
  • False

11. How do you work out the population size?

  • Multiply half the total area by the mean
  • Add the mean to the total area of the habitat
  • Multiply the mean by the total area of the habitat
  • Divide the mean by the total area of the habitat

12. What is a tissue?

  • A tissue is an organ system
  • A tissue is a group of different cells that work together to carry out a particular function
  • A tissue is a group of similar cells that work together to carry out a particular function
  • A tissue is a group of organs working together to perform a particular function

13. What substance can be used to control the amount of CO2?

  • Iodine
  • Sodium Hydrate
  • Sodium Hydrogencarbonate
  • Sodium Sulfate

14. How does water reach the cells?

  • It is transported by the Epidermal tissue
  • Via the Xylem
  • It is transported by the Mesophyll tissue
  • It diffuses into the leaf

15. How can you increase the level of carbon dioxide in greenhouses?

  • Use artificial light
  • Use ventilation
  • Use a paraffin heater
  • Use a paraffin light

16. What is glycogen used for?

  • Photosynthesis
  • Incomplete breakdown of glucose
  • To provide more energy
  • To quicken digestion

17. Where is Bile stored?

  • Small Intestine
  • Gall Bladder
  • Stomach
  • Salivary Gland

18. What do yeast cells have that bacterial cells do not?

  • Cell membrane
  • Nucleus
  • Cell wall
  • Cytoplasm