1. How are the following tissues adapted for their function?
Starter
How are the following tissues adapted for their function?
Tissue
Function
Adaptation
Epidermal
Palisade Mesophyll
Spongy Mesophyll

2. Transportation In Plants
The roots, stem, and leaves form a plant organ system for the transport of substances around the plant.

3. Vascular Tissues: Phloem and Xylem
Read pg. 85 and make a note of the similarities and differences between xylem and phloem.
Phloem
Xylem
Type of Cell
Between Cells
(Type of End Walls)
Materials Transported
Direction of Transport
Name of transport process
Diagram

4. Elongated living cells Dead cells strengthened with lignin
Phloem
Xylem
Type of Cell
Elongated living cells
Dead cells strengthened with lignin
Between Cells
(Type of End Walls)
End walls with small pores
No end walls
Materials Transported
Dissolved food substances (sugars)
Water and minerals
Direction of Transport
Both directions
Upwards (root to stem and leaves)
Name of transport process
translocation
Transpiration stream
Diagram

5. Transpiration Transpiration = loss of water from a plant
Transpiration stream = movement of water from the roots to the leaves
Why does this happen?

6. Like sucking liquid through a straw!
Water evaporates and diffuses out (mainly through stomata)
Creates a shortage of water, more water is drawn up through the xylem
More water is drawn up through the roots creating a constant stream

7. Roots
Function: absorption of water (by osmosis) and mineral ions (by active transport).
Adaptations: contain root hair cells that create a larger surface area and speeds up osmosis and active transport.

8. Factors Affecting Transpiration
Explain how each of these factors affect the rate (speed) of transpiration. (pg. 87)
Light intensity
Temperature
Air flow
Humidity

9. Role of Stomata (Review)
Stomata allow gases to diffuse into (and out) of the leaf.
Guard cells control the size of the stomata and control water loss (through evaporation and diffusion).
guard cells

10. Investigating Transpiration Rate
A potometer can be used to measure the rate of transpiration.

12. Calculating Rate of Transpiration

13. Homework
Answer the exam style questions on pg