Transportation in Plants

Question 1

List the features of the xylem

Answer 1

Outer cells are not living 
One-way only
No end walls between cells 
Water and minerals
Mixture of dead and living cells
Composed of tracheid's and vessel elements

Question 2

List the features of the phloem

Answer 2

Organic molecules
End walls
Two-way movement
Cells are living but need support

Question 3

Explain the process of the movement of water through the xylem

Answer 3

1. Water in the soil
2. Root hair
3. Root cortex
4. Xylem
5. Upward movement through xylem
6. Leaves
7. Diffusion through stomata

Question 4

Explain what root pressure means

Answer 4

Ions in the soil are pulled into the root via active transport
Concentration of water inside the plant is lower than outside
Water will be pulled into the roots via osmosis.
The pressure caused by the intake of water pushes the water from the roots to stem.

Question 5

Explain the process of translocation

Answer 5

Moves through the narrow sieve tubes from a source cells, where it is created, to a sink cell, where it is stored
A sugar is pushed into the phloem, water will follow (concentration gradient)
This puts pressure on the sap and it will move throughout the phloem