Phloem and Xylem Functions in Plants

The video tutorial explains the roles of phloem and xylem in plants. Phloem transports food substances like sucrose through a process called translocation, which can move substances both up and down the plant. Xylem, on the other hand, transports water and dissolved mineral ions only upwards through transpiration. The video also highlights the structural differences between phloem and xylem, such as the presence of end walls in phloem and the dead cells in xylem. A summary table compares the two types of tubes, emphasizing their functions, structures, and processes.

What is the primary function of phloem tubes in plants?

• Transporting food substances

• Transporting water

• Providing structural support

• Absorbing nutrients from the soil

What type of cells make up the phloem tubes?

• Living cells

• Sclerenchyma cells

• Dead cells

• Parenchyma cells

What is the process called that involves the movement of food substances in phloem?

• Respiration

• Photosynthesis

• Translocation

• Transpiration

In which direction can phloem transport substances?

• Horizontally

• Only upwards

• Only downwards

• Both upwards and downwards

What is the main difference between xylem and phloem tubes?

• Xylem transports food, phloem transports water

• Xylem has end walls, phloem does not

• Xylem transports water, phloem transports food

• Xylem is made of living cells, phloem is made of dead cells

What is the primary function of xylem tubes?

• Absorbing sunlight

• Providing energy

• Transporting water and mineral ions

• Transporting food substances

What strengthens the walls of xylem tubes?

• Pectin

• Chitin

• Lignin

• Cellulose

What is the process called that involves the movement of water in xylem?

• Translocation

• Transpiration

• Photosynthesis

• Osmosis

Which of the following is true about xylem tubes?

• They have end walls

• They transport food substances

• They are made of living cells

• They transport substances only upwards

Which process requires energy: translocation or transpiration?

• Translocation

• Transpiration

• Neither process

• Both processes