Plants & photosynthesis

• What provides the energy for photosynthesis ?

  Light
• Photosynthesis


  Carbon dioxide + Water → Oxygen + Glucose
• Energy for photosynthesis


  Sun (light)
• Limiting factor


  Something which holds back the rate of growth of a plant
• Limiting factors


  • Light
  • Carbon dioxide
  • Temperature
• Plant stops growing if too hot

  Enzymes are denatured
• Osmosis


  The movement of water from a high concentration of water to a low concentration of water down a concentration gradient
• What is the chemical in plant cells that’s absorb light to carry out photosynthesis?

  Chlorophyll
• What chemical in the plant controls the rate of photosynthesis ?

  Enzymes
• Palisade mesophyll


  The layer of cells in the leaf that carries out the most photosynthesis
• Guard cells


  Cells that can open and close to control the movement of water out of the leaf
• Turgid cell


  A plant cell containing enough water that the cytoplasm pushes against the cell wall
• Flaccid cell


  A plant cell lacking in water to the point that the cytoplasm sags away from the cell wall
• Root cell adapted to absorb water efficiently

  • Root hairs increase the surface area
• Transpiration


  The process that transports water from the roots to the leaves
• Decreased humidity


  Speeds up transpiration
• Nitrates transported into root cells

  Active transport
• Farmers add NPK fertiliser to fields lacking in nutrients
• the experiment
• How do you de-starch a plant ?

  Keep it in the dark for 24 hours
• What tissue transports sucrose throughout the plant?

  phloem
• What are the products of photosynthesis?


  Glucose and oxygen
• What are the reactants in photosynthesis?

  Carbon dioxide and water
• What is the most photosynthesis take place

  Palisades sells
• What is a hyertonic solution?

  Solution is higher concentration
• what is an isotonic solution?

  Solution at the same concentration
• 
  

  What is a hypotonic solution?

  lower concentration