HARD
AS and A Level
IMPORTANT
Earn 100
Identify six xerophytic features of leaves and explain how each features helps the plant to conserve water. Summarise the answer in a table.
Important Questions on Transport in Plants
MEDIUM
AS and A Level
IMPORTANT
Explain how the total lack of cell contents adapts xylem vessels for their function of transporting water from roots to leaves.
MEDIUM
AS and A Level
IMPORTANT
Explain how the absence of end walls in individual xylem elements adapts xylem vessels for their function of transporting water from roots to leaves.
MEDIUM
AS and A Level
IMPORTANT
Explain how the narrow diameter (between 0.01mm and 0.2mm) adapts xylem vessels for their function of transporting water from roots to leaves.
MEDIUM
AS and A Level
IMPORTANT
Explain how the lignified wall adapts xylem vessels for their function of transporting water from roots to leaves.
MEDIUM
AS and A Level
IMPORTANT
Explain how pits adapts xylem vessels for their function of transporting water from roots to leaves.
MEDIUM
AS and A Level
IMPORTANT
The accepted theory for how water moves through xylem is called the cohesion- tension theory. It relies largely on what is called transpiration pull. Briefly explain the use of the terms cohesion-tension and transpiration pull.
EASY
AS and A Level
IMPORTANT
Give an example of an organic molecule containing nitrogen.
EASY
AS and A Level
IMPORTANT
Give an example of an organic molecule containing phosphorus.
