Question
Which products of the light-dependent reactions are used in the Calvin cycle?
A. \(O_2\) and hydrogen ions
B. ATP and \(CO_2\)
C. Electrons and reduced NADP
D. ATP and reduced NADP
Answer/Explanation
Question
Which graph represents the effect of humidity on the transpiration rate in plants?
Answer/Explanation
Question
The diagrams represent cross sections of the stem and root of a plant.
Answer/Explanation
Question
What is an aspect of indeterminate growth in plants?
A. The shoot apex retains undifferentiated cells that can divide repeatedly to produce new leaves.
B. The shoot can grow in any direction to maximize absorption of light for photosynthesis.
C. Some buds on the stem grow to produce side-shoots but others never develop.
D. Some plants grow faster than others.
Answer/Explanation
Question
The diagram shows the longitudinal section of phloem tissue at a plant source.
What is a function of the structures labelled X?
A. To provide the companion cell with carbon dioxide
B. To provide the companion cell with glucose
C. To allow movement of sucrose into the sieve tube
D. To allow movement of starch into the sieve tube