Question
What causes the diffusion of oxygen into a plant cell?
A active transport
B movement of molecules
C osmosis
D photosynthesis
Answer/Explanation
Ans
B
Question
The lower end of a plant stem is placed in water coloured with red dye. After three hours, the
stem is cut as shown in the diagram.
Which labelled region is stained red?
Answer/Explanation
Ans
A
Question
By which process is water lost from a leaf?
A active transport
B diffusion
C osmosis
D photosynthesis
Answer/Explanation
Ans
B
Question
Which graph represents the effect of increasing temperature on the rate of diffusion?
Answer/Explanation
Ans
D
Question
The diagram shows a cross-section through a leaf.
Which arrow shows the direction of diffusion of carbon dioxide on a sunny day?
Answer/Explanation
Ans
D