MEDIUM
AS and A Level
IMPORTANT
Earn 100
Explain how the narrow diameter (between 0.01mm and 0.2mm) adapts xylem vessels for their function of transporting water from roots to leaves.
Important Questions on Transport in Plants
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.
EASY
AS and A Level
IMPORTANT
Give an example of an organic molecule containing sulphur.
EASY
AS and A Level
IMPORTANT
Which substances listed in the below table are the assimilates (made by plants)?
Components of phloem sap
HARD
AS and A Level
IMPORTANT
Which of the following are sources and which are sink?
a. a nectary in a flower
b. a developing fruit
c. the storage tissue of potato tuber (a storage organ) when the buds are beginning to sprout
d. a potato tuber being formed
