Question
Which process is used to transport sucrose from the leaves of a plant to its flowers?
A diffusion
B osmosis
C translocation
D transpiration
Answer/Explanation
Ans
C
Question
During growth, potato plants produce flowers and underground storage organs called tubers.
During this time, which parts of the plant act as sources and sinks for translocation?
Answer/Explanation
Ans
B
Question
The diagram shows some potato tubers. New shoots are beginning to grow.
Sucrose is being translocated from source to sink.
Which statement is correct?
A The tuber is a sink.
B The soil is a sink.
C The shoots are sources.
D The shoots are sinks.
Answer/Explanation
Ans
D
Question
The graph shows the rate of uptake of magnesium ions by two similar plants, X and Y.
The roots of each plant were placed in a range of solutions. Each solution contained a different
concentration of magnesium ions. All other conditions were kept constant.
What is a possible explanation for the difference in the results for the two plants?
A Plant Y has fewer protein molecules for magnesium ion transport in its cell membranes.
B Plant Y has a higher rate of respiration.
C Plant Y has more root hair cells.
D The root hair cells in plant Y have a lower water potential.
Answer/Explanation
Ans: A