INVESTIGATING

• TWO METHODS OF INVESTIGATING TRANSLOCATION?

  tracers or ringing experiment
• HOW DO TRACERS WORK?

  radioactively label carbon, causing film to turn black and show sugars are transported in the phloem and where
• WHY DO TRACERS WORK?

  carbon is used to make sugars, and is therefore transported in the phloem
• WHAT HAPPENS IN THE RINGING EXPERIMENT?

  • rings of bark and phloem are peeled and removed off trunk
  • trunk swells
  • proves phloem transports sugars as liquid in swelling contains sugars
• WHAT DOES THE SWELLING IN THE RINGING EXPERIMENT MEAN?

  sugars cannot be transported