organisation in plants

Cards (35)

  • Why is a leaf considered an organ?
    Many tissues work together for photosynthesis
  • How is the upper epidermis adapted for its function?
    Transparent cells allow light to pass
  • How is the palisade mesophyll adapted for its function?
    Tightly packed cells absorb light for photosynthesis
  • How is the spongy mesophyll adapted for its function?
    Air spaces increase surface area and allow diffusion
  • What is the function of the guard cells?
    Control the opening/closing of the stomata
  • What is the function of the xylem?
    Transport water and mineral ions
  • How are xylem cells adapted to their function?
    Made of dead cells, no end walls
  • What strengthens the xylem cell walls?
    Lignin
  • What is the function of the phloem?
    Transport dissolved sugars
  • What is the purpose of translocation?
    Transport dissolved sugars
  • What is transpiration?
    Loss of water from the leaf
  • What are plant walls made of?
    Dead cells
  • What isn't found between plant cells?
    End wall
  • What chemical strengthens plant cell walls?
    Lignin
  • What does lignin enable plant cell walls to withstand?
    Water pressure
  • What is transported from the leaves to the rest of the plant?
    Dissolved sugars
  • Where are dissolved sugars transported from the leaves?
    Other parts of the plant
  • What processes do plants use dissolved sugars for?
    Respiration, growth, and storage
  • What moves water from the roots to the leaves?
    Xylem
  • What does water provide to keep plant cells turgid?
    Keeps cells turgid
  • What does water provide for photosynthesis?
    Water for photosynthesis
  • What does the xylem transport to the leaves?
    Mineral ions
  • What environmental factors affect the rate of transpiration?
    • Temperature
    • Light intensity
    • Humidity
    • Wind speed
  • How do higher temperatures affect the rate of transpiration?
    Increase the rate of transpiration
  • How do higher humidity levels affect the rate of transpiration?
    Decrease the rate of transpiration
  • Why do stomata open wider?
    To let more carbon dioxide in
  • What process is aided by the entry of carbon dioxide into the leaf?
    Photosynthesis
  • What do open stomata allow?
    Diffusion of gases in and out
  • Where are stomata primarily located on leaves?
    Underside of leaves
  • What is reduced by the stomata location on the underside of leaves?
    Water loss through evaporation
  • What is transpiration measured by?
    Change in mass of a plant
  • What is transpiration measured by?
    Volume of water absorbed by plant
  • What instrument is used to determine the rate of transpiration?
    A potometer
  • What does a potometer measure to determine the rate of transpiration?
    Volume of water absorbed
  • How can the volume of water absorbed be calculated using a potometer?
    Measuring the distance traveled by air