Biology unit 6

• what carbohydrate to green plants make?


  glucose
• what do plants need to make glucose?


  carbon dioxide and water
• how is the energy for chlorophyll obtained?

  chlorophyll trapping sunlight
• what is photosynthesis?


  the process by which plants manufacture carbohydrates from raw materials using energy from light
• photosynthesis word equation?

  carbon dioxide+water----light----chlorophyll----> glucose+ oxygen
• photosynthesis equation?

  6CO2+6H2O---->C6h12O6+6O2
• How does carbon dioxide get in the plant for photosynthesis?

  diffuses into the leaf through the stomata
• how does water get in the plant?


  taken up by the roots and transported by xylem
• what happens to glucose after photosynthesis?


  used to make substances needed by the plant, used in respiration to release energy
• what happens to oxygen after photosynthesis?


  diffuses out of the leaf through the stomata, used for respiration
• what is chlorophyll?

  Chlorophyll is a green pigment that is found in chloroplasts within plant cells
• what does chlorophyll do?

  it transfers energy from light into energy in chemicals
• what do plants do with carbohydrates after photosynthesis?

  starch to store energy, into cellulose to build cell walls, Glucose can be used in respiration , Converted to sucrose for transport in the phloem, As nectar to attract insects for pollination
• How do plants obtain magnesium and nitrogen?

  in the form of mineral ions actively absorbed from the soil by root hair cells
• magnesium function in plant?


  make chlorophyll
• nitrate function in plant?


  make amino acids
• what is photosynthesis's limited by?


  whatever factor is lowest at the time
• what factors affect the rate of photosynthesis?

  temperature, light intensity and carbon dioxide concentration
• temperature increases?


  rate of photosynthesis increases
• light increases?

  photosynthesis increases
• more carbon dioxide?

  photosynthesis increases
• upper epidermis?

  thin and transparent
• Palisade mesophyll?

  column shaped cells tightly packed
• spongy mesophyll?


  has internal air space to increase surface area
• Lower epidermis?

  contains guard cells and stomata
• Guard cell?


  absorbs and loses water to open and close the stomata
• Stomata?


  gas exchange takes place, open in day, closed in night
• vascular bundle?


  contains phloem and xylem
• xylem?


  transports water into the leaf
• phloem?


  transports sucrose and amino acids around the plant