the need for transport systems in plants

• how are animals and plants different in the transport of minerals


  animals have only one transport system
• what are the two separate transport systems in plants

  the xylem and phloem
• what does the xylem transport and in what direction


  water and upwards only
• what does the phloem transport and in what direction


  photosynthates both up and down
• what are examples of photosynthates transported in the phloem


  sucrose and amino acids
• describe the transport of water and mineral ions through the xylem


  it starts from the roots and travels to the shoots
• what is the xylem made out of


  dead cells
• what is used yo strengthen the walls of the xylem


  lignin
• how does water move up through the xylem


  though cohesion between the water molecules and adhesion with the walls
• What are the products of photosynthesis know as


  photosynthates
• what is meant by bi-directional movement


  this is the movement that transports photosynthates up and down the plant
• why do plants require transport systems


  to transport water and mineral ions from the roots to the leaves for photosynthesis and to transport the products of photosynthesis from the leaves to other organs of the plant