Transport in plants Details

Question 1

Structure of xylem vessels

Answer 1

-Thick walls with lignin
-No cell contents
-Cells joined end to end(no cross walls) to form a continuous tube

Question 2

Significance of the large surface area of root hairs

Answer 2

It increases the uptake of water and mineral ions

Question 3

Pathway taken by water through the root

Answer 3

Root hair cells
↓
Root cortex cells
↓
Xylem
↓
Mesophyll cells

Question 4

Process of transpiration

Answer 4

Water evaporates from the surfaces of the mesophyll cells into the air spaces and then diffuses out of the leaves through the stomata as water vapour

Question 5

Factors which affect the rate of transpiration

Answer 5

-Temperature
-Wind speed
-Humidity
-Light intensity

Question 6

Reason for wilting

Answer 6

The cells are not full of water(due to the plant losing water faster than it is absorbing it), resulting in the cell walls lacking the strength to support the plant