Question
The diagram shows an experiment to investigate the response of a plant stem to gravity.
What is a suitable control for this experiment?
Answer/Explanation
Ans
A
Question
The diagram shows an experiment using wheat shoot tips to investigate plant growth.
Which statement is supported by the evidence provided by this experiment?
A Auxin moves through the plant by osmosis.
B Auxin is made in the shoot tip.
C Auxin is unequally distributed in response to light.
D Auxin inhibits cell elongation.
Answer/Explanation
Ans
B
Question
The diagram shows a shoot growing towards light.
Which statement about the role of auxin in phototropism is correct?
A Auxin will move to the dark side of the shoot and cause cells to elongate.
B Auxin will move to the dark side of the shoot and prevent cells from elongating.
C Auxin will move to the light side of the shoot and cause cells to elongate.
D Auxin will move to the light side of the shoot and prevent cells from elongating.
Answer/Explanation
Ans: A
Question
A seedling was placed in a horizontal position.
Which diagram shows the result of the gravitropic responses in the seedling?
Answer/Explanation
Ans: C