Plants and photosynthesis

    Cards (24)

    • What is photosynthesis?
      A series of enzyme controlled reactions
    • What role does chlorophyll play in photosynthesis?
      It absorbs light energy for the reaction
    • What is the organ of photosynthesis in plants?
      The leaf
    • Why is water important in photosynthesis?
      It is needed for photosynthesis and transport
    • How does water provide support to plant cells?
      By filling cells and pushing against cell walls
    • What happens to leaves when they lack water?
      They become flaccid and wilt
    • What is transpiration in plants?
      Loss of water from the stomata
    • What are the four limiting factors affecting photosynthesis?
      Temperature, light intensity, CO₂, humidity
    • How is the rate of photosynthesis usually measured?
      By recording the amount of oxygen produced
    • How can light intensity be investigated in photosynthesis?
      By moving a plant closer to a light source
    • What does sodium hydroxide do in photosynthesis experiments?
      It absorbs CO₂
    • What happens when CO₂ levels increase in photosynthesis?
      The rate of photosynthesis becomes constant
    • How can temperature be controlled in a photosynthesis experiment?
      By using an air conditioner
    • What is the first step in testing a leaf for starch?
      Boil the leaf to kill it
    • What indicates the presence of starch in a leaf test?
      A blue/black color with iodine
    • What are the three essential minerals for plant growth mentioned?
      Nitrogen, potassium, phosphates
    • What growth problem is caused by nitrogen deficiency?
      Poor growth
    • What growth problem is caused by potassium deficiency?
      Yellowing of leaves
    • What growth problem is caused by phosphate deficiency?
      Poor root growth
    • What factors affect the rate of photosynthesis?
      Temperature, humidity, wind speed
    • What direction does xylem carry water in plants?

      Up the plant
    • How do root hairs assist in water absorption?
      They increase the surface area for absorption
    • What process allows water to be drawn into root cells?
      Osmosis
    • Why do root cells require lots of oxygen?
      Because they are actively respiring