HARD
AS and A Level
IMPORTANT
Earn 100
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
Important Questions on Transport in Plants
HARD
AS and A Level
IMPORTANT
Sucrose is highly soluble in water. It is also relatively inactive metabolically. Suggest how these two properties make it suitable as a long distance transport sugar.
HARD
AS and A Level
IMPORTANT
If sucrose is actively loaded into a companion cell, which combination of changes take place in the cytoplasm of companion cells?
HARD
AS and A Level
IMPORTANT
Which of the following correctly describes the pressure of the two types of elements?
HARD
AS and A Level
IMPORTANT
The figure shows diagrams of T.S of two plant organs, X and Y, containing vascular tissue. Which of the following rows correctly identifies the tissues?
MEDIUM
AS and A Level
IMPORTANT
Movement of water from a root hair to xylem cannot take place entirely through the apoplast pathway due to cell in the
HARD
AS and A Level
IMPORTANT
Explain how water moves from the soil into a root hair cell.
HARD
AS and A Level
IMPORTANT
Explain how water moves from one root cortex cell to another.
HARD
AS and A Level
IMPORTANT
Explain how water moves from a xylem vessel into a leaf mesophyll cell.
