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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?
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
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