62. Intext question XIV

 

The transportation of food through the phloemxylem is aided by the use of energy. Using energy from ATP, the sugar (food) produced in rootsleaves is loaded into the sieve tubes of phloem tissue. OsmosisDiffusion allows water to enter the sieve tubes containing sugar, causing the pressure in the phloem tissue to rise. The high pressure created in the phloem tissue transports the food to all sections of the plant with lower pressure. This enables the phloem to transfer food in accordance with the plant's requirements.