Structure of the Leaf

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  • Created by: DOMAR34
  • Created on: 02-03-15 21:42

1. What is the function of the Lower Epidermis

  • Cells contain lots of air spaces which are connected to the stomata which allow optimum exchange of gases
  • Contain guard cells which regulate the opening and closing of the stomata.
  • Cells towards the top of the leaf contain chloroplasts which allow maximum absorption of sunlight
  • Transparent to allow sunlight through to other layers.
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2. What is the function of the upper epidermis?

  • Contains lots of air space to allow optimum gas exchange.
  • Contain guard cells which regulate the opening and closing of the stomata.
  • Transparent to allow sunlight through to other layers.
  • Contains chloroplasts to absorb maximum amount of light.

3. Why does a plant require mineral ions?

  • To drink water.
  • To stay alive.
  • To be healthy and grow properly.
  • To generate food.

4. How does CO2 concentration affect the rate of photosynthesis?

  • The lower the concentration of CO2, the higher the rate of photosynthesis.
  • The hgiher the concentration of CO2, the higher the rate of photosynthesis however CO2 limits the rate of photosynthesis. After a certain point the increase of CO2 has no further effect.
  • The higher the concentration of CO2, the lower the rate of photosynthesis.
  • The lower the concentration of CO2, the lower the rate of photosynthesis.

5. How does light intensity affect the rate of photosynthesis?

  • The lower the light intensity, the lower the rate of photosynthesis.
  • The higher the light intensity, the lower the rate of photosynthesis.
  • The higher the light intensity, the higher the rate of photosynthesis however light intensity limits the rate of photosynthesis. After a while the light intensity has no further affect on the rate of photosynthesis
  • The lower the light intensity, the higher the rate of photosynthesis.
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